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Finding the Fourth Proportional to 390,666.56, 585,993.76 and 124,424.84

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Solution

The fourth proportional to 390,666.56, 585,993.76 and 124,424.84 is: 186,635.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,666.56 : 585,993.76 = 124,424.84 : x
  2. Step 2: Convert to fraction form
    390,666.56/585,993.76 = 124,424.84/x
  3. Step 3: Cross multiply
    390,666.56x = 585,993.76 × 124,424.84
  4. Step 4: Simplify right side
    390,666.56x = 72,912,179,829.00
  5. Step 5: Solve for x
    x = 72,912,179,829.00/390,666.56
  6. Step 6: Final answer
    x = 186,635.32

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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.