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Finding the Fourth Proportional to 390,558, 585,837.12 and 95,070

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Solution

The fourth proportional to 390,558, 585,837.12 and 95,070 is: 142,605.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,558 : 585,837.12 = 95,070 : x
  2. Step 2: Convert to fraction form
    390,558/585,837.12 = 95,070/x
  3. Step 3: Cross multiply
    390,558x = 585,837.12 × 95,070
  4. Step 4: Simplify right side
    390,558x = 55,695,534,998.40
  5. Step 5: Solve for x
    x = 55,695,534,998.40/390,558
  6. Step 6: Final answer
    x = 142,605.03

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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.