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Finding the Fourth Proportional to 598,915.20, 898,372.80 and 430,078.80

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Solution

The fourth proportional to 598,915.20, 898,372.80 and 430,078.80 is: 645,118.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    598,915.20 : 898,372.80 = 430,078.80 : x
  2. Step 2: Convert to fraction form
    598,915.20/898,372.80 = 430,078.80/x
  3. Step 3: Cross multiply
    598,915.20x = 898,372.80 × 430,078.80
  4. Step 4: Simplify right side
    598,915.20x = 386,371,095,776.64
  5. Step 5: Solve for x
    x = 386,371,095,776.64/598,915.20
  6. Step 6: Final answer
    x = 645,118.20

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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.