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Finding the Fourth Proportional to 284,312.43, 392,352.51 and 155,253.61

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Solution

The fourth proportional to 284,312.43, 392,352.51 and 155,253.61 is: 214,250.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,312.43 : 392,352.51 = 155,253.61 : x
  2. Step 2: Convert to fraction form
    284,312.43/392,352.51 = 155,253.61/x
  3. Step 3: Cross multiply
    284,312.43x = 392,352.51 × 155,253.61
  4. Step 4: Simplify right side
    284,312.43x = 60,914,143,769.40
  5. Step 5: Solve for x
    x = 60,914,143,769.40/284,312.43
  6. Step 6: Final answer
    x = 214,250.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.