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Finding the Fourth Proportional to 520,909.35, 718,867.81 and 291,464.76

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Solution

The fourth proportional to 520,909.35, 718,867.81 and 291,464.76 is: 402,228.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,909.35 : 718,867.81 = 291,464.76 : x
  2. Step 2: Convert to fraction form
    520,909.35/718,867.81 = 291,464.76/x
  3. Step 3: Cross multiply
    520,909.35x = 718,867.81 × 291,464.76
  4. Step 4: Simplify right side
    520,909.35x = 209,524,636,773.46
  5. Step 5: Solve for x
    x = 209,524,636,773.46/520,909.35
  6. Step 6: Final answer
    x = 402,228.60

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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.