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Finding the Fourth Proportional to 520,439.66, 718,404.91 and 339,195.68

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Solution

The fourth proportional to 520,439.66, 718,404.91 and 339,195.68 is: 468,219.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,439.66 : 718,404.91 = 339,195.68 : x
  2. Step 2: Convert to fraction form
    520,439.66/718,404.91 = 339,195.68/x
  3. Step 3: Cross multiply
    520,439.66x = 718,404.91 × 339,195.68
  4. Step 4: Simplify right side
    520,439.66x = 243,679,838,370.76
  5. Step 5: Solve for x
    x = 243,679,838,370.76/520,439.66
  6. Step 6: Final answer
    x = 468,219.20

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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.