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Finding the Fourth Proportional to 261,418.50, 392,127.75 and 64,426.50

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Solution

The fourth proportional to 261,418.50, 392,127.75 and 64,426.50 is: 96,639.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,418.50 : 392,127.75 = 64,426.50 : x
  2. Step 2: Convert to fraction form
    261,418.50/392,127.75 = 64,426.50/x
  3. Step 3: Cross multiply
    261,418.50x = 392,127.75 × 64,426.50
  4. Step 4: Simplify right side
    261,418.50x = 25,263,418,485.38
  5. Step 5: Solve for x
    x = 25,263,418,485.38/261,418.50
  6. Step 6: Final answer
    x = 96,639.75

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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.