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Finding the Fourth Proportional to 390,695.10, 584,443.95 and 295,215.54

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Solution

The fourth proportional to 390,695.10, 584,443.95 and 295,215.54 is: 441,615.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,695.10 : 584,443.95 = 295,215.54 : x
  2. Step 2: Convert to fraction form
    390,695.10/584,443.95 = 295,215.54/x
  3. Step 3: Cross multiply
    390,695.10x = 584,443.95 × 295,215.54
  4. Step 4: Simplify right side
    390,695.10x = 172,536,936,298.98
  5. Step 5: Solve for x
    x = 172,536,936,298.98/390,695.10
  6. Step 6: Final answer
    x = 441,615.31

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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.