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Finding the Fourth Proportional to 261,655.40, 392,483.10 and 156,679.40

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Solution

The fourth proportional to 261,655.40, 392,483.10 and 156,679.40 is: 235,019.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,655.40 : 392,483.10 = 156,679.40 : x
  2. Step 2: Convert to fraction form
    261,655.40/392,483.10 = 156,679.40/x
  3. Step 3: Cross multiply
    261,655.40x = 392,483.10 × 156,679.40
  4. Step 4: Simplify right side
    261,655.40x = 61,494,016,618.14
  5. Step 5: Solve for x
    x = 61,494,016,618.14/261,655.40
  6. Step 6: Final answer
    x = 235,019.10

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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.