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Finding the Fourth Proportional to 521,701.04, 720,622.78 and 431,421.68

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Solution

The fourth proportional to 521,701.04, 720,622.78 and 431,421.68 is: 595,920.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,701.04 : 720,622.78 = 431,421.68 : x
  2. Step 2: Convert to fraction form
    521,701.04/720,622.78 = 431,421.68/x
  3. Step 3: Cross multiply
    521,701.04x = 720,622.78 × 431,421.68
  4. Step 4: Simplify right side
    521,701.04x = 310,892,286,073.70
  5. Step 5: Solve for x
    x = 310,892,286,073.70/521,701.04
  6. Step 6: Final answer
    x = 595,920.39

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.