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Finding the Fourth Proportional to 425,718.61, 638,627.33 and 141,434.53

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Solution

The fourth proportional to 425,718.61, 638,627.33 and 141,434.53 is: 212,168.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,718.61 : 638,627.33 = 141,434.53 : x
  2. Step 2: Convert to fraction form
    425,718.61/638,627.33 = 141,434.53/x
  3. Step 3: Cross multiply
    425,718.61x = 638,627.33 × 141,434.53
  4. Step 4: Simplify right side
    425,718.61x = 90,323,956,263.70
  5. Step 5: Solve for x
    x = 90,323,956,263.70/425,718.61
  6. Step 6: Final answer
    x = 212,168.21

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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.