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Finding the Fourth Proportional to 261,864.92, 392,969.58 and 143,619.26

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Solution

The fourth proportional to 261,864.92, 392,969.58 and 143,619.26 is: 215,523.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,864.92 : 392,969.58 = 143,619.26 : x
  2. Step 2: Convert to fraction form
    261,864.92/392,969.58 = 143,619.26/x
  3. Step 3: Cross multiply
    261,864.92x = 392,969.58 × 143,619.26
  4. Step 4: Simplify right side
    261,864.92x = 56,438,000,282.11
  5. Step 5: Solve for x
    x = 56,438,000,282.11/261,864.92
  6. Step 6: Final answer
    x = 215,523.33

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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.