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Finding the Fourth Proportional to 428,800.48, 591,781 and 237,875.38

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Solution

The fourth proportional to 428,800.48, 591,781 and 237,875.38 is: 328,288.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,800.48 : 591,781 = 237,875.38 : x
  2. Step 2: Convert to fraction form
    428,800.48/591,781 = 237,875.38/x
  3. Step 3: Cross multiply
    428,800.48x = 591,781 × 237,875.38
  4. Step 4: Simplify right side
    428,800.48x = 140,770,130,251.78
  5. Step 5: Solve for x
    x = 140,770,130,251.78/428,800.48
  6. Step 6: Final answer
    x = 328,288.18

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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.