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Finding the Fourth Proportional to 630,439.38, 870,005.16 and 343,959.66

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Solution

The fourth proportional to 630,439.38, 870,005.16 and 343,959.66 is: 474,663.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,439.38 : 870,005.16 = 343,959.66 : x
  2. Step 2: Convert to fraction form
    630,439.38/870,005.16 = 343,959.66/x
  3. Step 3: Cross multiply
    630,439.38x = 870,005.16 × 343,959.66
  4. Step 4: Simplify right side
    630,439.38x = 299,246,679,031.85
  5. Step 5: Solve for x
    x = 299,246,679,031.85/630,439.38
  6. Step 6: Final answer
    x = 474,663.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.