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Finding the Fourth Proportional to 520,470.31, 718,250.34 and 291,035.92

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Solution

The fourth proportional to 520,470.31, 718,250.34 and 291,035.92 is: 401,630.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,470.31 : 718,250.34 = 291,035.92 : x
  2. Step 2: Convert to fraction form
    520,470.31/718,250.34 = 291,035.92/x
  3. Step 3: Cross multiply
    520,470.31x = 718,250.34 × 291,035.92
  4. Step 4: Simplify right side
    520,470.31x = 209,036,648,492.21
  5. Step 5: Solve for x
    x = 209,036,648,492.21/520,470.31
  6. Step 6: Final answer
    x = 401,630.30

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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.