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Finding the Fourth Proportional to 520,397.74, 718,139.52 and 294,038.38

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Solution

The fourth proportional to 520,397.74, 718,139.52 and 294,038.38 is: 405,767.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,397.74 : 718,139.52 = 294,038.38 : x
  2. Step 2: Convert to fraction form
    520,397.74/718,139.52 = 294,038.38/x
  3. Step 3: Cross multiply
    520,397.74x = 718,139.52 × 294,038.38
  4. Step 4: Simplify right side
    520,397.74x = 211,160,581,074.78
  5. Step 5: Solve for x
    x = 211,160,581,074.78/520,397.74
  6. Step 6: Final answer
    x = 405,767.68

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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.