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Finding the Fourth Proportional to 728,715.40, 1,093,073.10 and 374,421.40

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Solution

The fourth proportional to 728,715.40, 1,093,073.10 and 374,421.40 is: 561,632.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,715.40 : 1,093,073.10 = 374,421.40 : x
  2. Step 2: Convert to fraction form
    728,715.40/1,093,073.10 = 374,421.40/x
  3. Step 3: Cross multiply
    728,715.40x = 1,093,073.10 × 374,421.40
  4. Step 4: Simplify right side
    728,715.40x = 409,269,960,404.34
  5. Step 5: Solve for x
    x = 409,269,960,404.34/728,715.40
  6. Step 6: Final answer
    x = 561,632.10

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.