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Finding the Fourth Proportional to 261,352.40, 392,028.60 and 156,117.20

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Solution

The fourth proportional to 261,352.40, 392,028.60 and 156,117.20 is: 234,175.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,352.40 : 392,028.60 = 156,117.20 : x
  2. Step 2: Convert to fraction form
    261,352.40/392,028.60 = 156,117.20/x
  3. Step 3: Cross multiply
    261,352.40x = 392,028.60 × 156,117.20
  4. Step 4: Simplify right side
    261,352.40x = 61,202,407,351.92
  5. Step 5: Solve for x
    x = 61,202,407,351.92/261,352.40
  6. Step 6: Final answer
    x = 234,175.80

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1.5x scale

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.