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Finding the Fourth Proportional to 688,401.64, 950,061.72 and 398,025.55

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Solution

The fourth proportional to 688,401.64, 950,061.72 and 398,025.55 is: 549,314.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,401.64 : 950,061.72 = 398,025.55 : x
  2. Step 2: Convert to fraction form
    688,401.64/950,061.72 = 398,025.55/x
  3. Step 3: Cross multiply
    688,401.64x = 950,061.72 × 398,025.55
  4. Step 4: Simplify right side
    688,401.64x = 378,148,838,636.95
  5. Step 5: Solve for x
    x = 378,148,838,636.95/688,401.64
  6. Step 6: Final answer
    x = 549,314.26

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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.