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Finding the Fourth Proportional to 390,065.08, 585,055.70 and 264,511.24

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Solution

The fourth proportional to 390,065.08, 585,055.70 and 264,511.24 is: 396,738.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,065.08 : 585,055.70 = 264,511.24 : x
  2. Step 2: Convert to fraction form
    390,065.08/585,055.70 = 264,511.24/x
  3. Step 3: Cross multiply
    390,065.08x = 585,055.70 × 264,511.24
  4. Step 4: Simplify right side
    390,065.08x = 154,753,805,750.79
  5. Step 5: Solve for x
    x = 154,753,805,750.79/390,065.08
  6. Step 6: Final answer
    x = 396,738.43

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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.