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Finding the Fourth Proportional to 428,164.18, 590,866.65 and 234,572.76

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Solution

The fourth proportional to 428,164.18, 590,866.65 and 234,572.76 is: 323,710.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,164.18 : 590,866.65 = 234,572.76 : x
  2. Step 2: Convert to fraction form
    428,164.18/590,866.65 = 234,572.76/x
  3. Step 3: Cross multiply
    428,164.18x = 590,866.65 × 234,572.76
  4. Step 4: Simplify right side
    428,164.18x = 138,601,220,882.45
  5. Step 5: Solve for x
    x = 138,601,220,882.45/428,164.18
  6. Step 6: Final answer
    x = 323,710.46

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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.