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Finding the Fourth Proportional to 478,776.70, 660,711.54 and 260,985.79

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Solution

The fourth proportional to 478,776.70, 660,711.54 and 260,985.79 is: 360,160.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,776.70 : 660,711.54 = 260,985.79 : x
  2. Step 2: Convert to fraction form
    478,776.70/660,711.54 = 260,985.79/x
  3. Step 3: Cross multiply
    478,776.70x = 660,711.54 × 260,985.79
  4. Step 4: Simplify right side
    478,776.70x = 172,436,323,565.56
  5. Step 5: Solve for x
    x = 172,436,323,565.56/478,776.70
  6. Step 6: Final answer
    x = 360,160.22

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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.