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Finding the Fourth Proportional to 262,159.20, 392,947.20 and 143,915.40

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Solution

The fourth proportional to 262,159.20, 392,947.20 and 143,915.40 is: 215,713.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,159.20 : 392,947.20 = 143,915.40 : x
  2. Step 2: Convert to fraction form
    262,159.20/392,947.20 = 143,915.40/x
  3. Step 3: Cross multiply
    262,159.20x = 392,947.20 × 143,915.40
  4. Step 4: Simplify right side
    262,159.20x = 56,551,153,466.88
  5. Step 5: Solve for x
    x = 56,551,153,466.88/262,159.20
  6. Step 6: Final answer
    x = 215,713.02

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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.