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Finding the Fourth Proportional to 630.08, 870.05 and 409.29

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Solution

The fourth proportional to 630.08, 870.05 and 409.29 is: 565.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.08 : 870.05 = 409.29 : x
  2. Step 2: Convert to fraction form
    630.08/870.05 = 409.29/x
  3. Step 3: Cross multiply
    630.08x = 870.05 × 409.29
  4. Step 4: Simplify right side
    630.08x = 356,100.72
  5. Step 5: Solve for x
    x = 356,100.72/630.08
  6. Step 6: Final answer
    x = 565.17

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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.