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Finding the Fourth Proportional to 390,575.70, 585,857.34 and 124,332.35

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Solution

The fourth proportional to 390,575.70, 585,857.34 and 124,332.35 is: 186,496.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,575.70 : 585,857.34 = 124,332.35 : x
  2. Step 2: Convert to fraction form
    390,575.70/585,857.34 = 124,332.35/x
  3. Step 3: Cross multiply
    390,575.70x = 585,857.34 × 124,332.35
  4. Step 4: Simplify right side
    390,575.70x = 72,841,016,917.66
  5. Step 5: Solve for x
    x = 72,841,016,917.66/390,575.70
  6. Step 6: Final answer
    x = 186,496.54

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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.