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Finding the Fourth Proportional to 478,589.50, 660,050.94 and 287,565.99

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Solution

The fourth proportional to 478,589.50, 660,050.94 and 287,565.99 is: 396,599.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,589.50 : 660,050.94 = 287,565.99 : x
  2. Step 2: Convert to fraction form
    478,589.50/660,050.94 = 287,565.99/x
  3. Step 3: Cross multiply
    478,589.50x = 660,050.94 × 287,565.99
  4. Step 4: Simplify right side
    478,589.50x = 189,808,202,011.53
  5. Step 5: Solve for x
    x = 189,808,202,011.53/478,589.50
  6. Step 6: Final answer
    x = 396,599.18

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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.