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Finding the Fourth Proportional to 285,624.70, 428,350.69 and 85,892.07

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Solution

The fourth proportional to 285,624.70, 428,350.69 and 85,892.07 is: 128,812.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,624.70 : 428,350.69 = 85,892.07 : x
  2. Step 2: Convert to fraction form
    285,624.70/428,350.69 = 85,892.07/x
  3. Step 3: Cross multiply
    285,624.70x = 428,350.69 × 85,892.07
  4. Step 4: Simplify right side
    285,624.70x = 36,791,927,450.03
  5. Step 5: Solve for x
    x = 36,791,927,450.03/285,624.70
  6. Step 6: Final answer
    x = 128,812.14

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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.