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Finding the Fourth Proportional to 390,276.01, 585,453.17 and 105,970.87

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Solution

The fourth proportional to 390,276.01, 585,453.17 and 105,970.87 is: 158,966.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,276.01 : 585,453.17 = 105,970.87 : x
  2. Step 2: Convert to fraction form
    390,276.01/585,453.17 = 105,970.87/x
  3. Step 3: Cross multiply
    390,276.01x = 585,453.17 × 105,970.87
  4. Step 4: Simplify right side
    390,276.01x = 62,040,981,769.16
  5. Step 5: Solve for x
    x = 62,040,981,769.16/390,276.01
  6. Step 6: Final answer
    x = 158,966.94

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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.