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Finding the Fourth Proportional to 520,339.72, 718,290.15 and 316,456.12

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Solution

The fourth proportional to 520,339.72, 718,290.15 and 316,456.12 is: 436,844.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,339.72 : 718,290.15 = 316,456.12 : x
  2. Step 2: Convert to fraction form
    520,339.72/718,290.15 = 316,456.12/x
  3. Step 3: Cross multiply
    520,339.72x = 718,290.15 × 316,456.12
  4. Step 4: Simplify right side
    520,339.72x = 227,307,313,903.22
  5. Step 5: Solve for x
    x = 227,307,313,903.22/520,339.72
  6. Step 6: Final answer
    x = 436,844.06

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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.