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Finding the Fourth Proportional to 390,647.12, 585,776.76 and 124,373

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Solution

The fourth proportional to 390,647.12, 585,776.76 and 124,373 is: 186,497.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,647.12 : 585,776.76 = 124,373 : x
  2. Step 2: Convert to fraction form
    390,647.12/585,776.76 = 124,373/x
  3. Step 3: Cross multiply
    390,647.12x = 585,776.76 × 124,373
  4. Step 4: Simplify right side
    390,647.12x = 72,854,812,971.48
  5. Step 5: Solve for x
    x = 72,854,812,971.48/390,647.12
  6. Step 6: Final answer
    x = 186,497.76

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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.