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Finding the Fourth Proportional to 630,437.38, 870,002.40 and 343,957.66

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Solution

The fourth proportional to 630,437.38, 870,002.40 and 343,957.66 is: 474,660.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,437.38 : 870,002.40 = 343,957.66 : x
  2. Step 2: Convert to fraction form
    630,437.38/870,002.40 = 343,957.66/x
  3. Step 3: Cross multiply
    630,437.38x = 870,002.40 × 343,957.66
  4. Step 4: Simplify right side
    630,437.38x = 299,243,989,698.38
  5. Step 5: Solve for x
    x = 299,243,989,698.38/630,437.38
  6. Step 6: Final answer
    x = 474,660.92

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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.