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Finding the Fourth Proportional to 402,578.75, 603,854.21 and 103,061.90

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Solution

The fourth proportional to 402,578.75, 603,854.21 and 103,061.90 is: 154,589.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,578.75 : 603,854.21 = 103,061.90 : x
  2. Step 2: Convert to fraction form
    402,578.75/603,854.21 = 103,061.90/x
  3. Step 3: Cross multiply
    402,578.75x = 603,854.21 × 103,061.90
  4. Step 4: Simplify right side
    402,578.75x = 62,234,358,671.02
  5. Step 5: Solve for x
    x = 62,234,358,671.02/402,578.75
  6. Step 6: Final answer
    x = 154,589.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.