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Finding the Fourth Proportional to 1,007.95, 1,510.29 and 422.47

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Solution

The fourth proportional to 1,007.95, 1,510.29 and 422.47 is: 633.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,007.95 : 1,510.29 = 422.47 : x
  2. Step 2: Convert to fraction form
    1,007.95/1,510.29 = 422.47/x
  3. Step 3: Cross multiply
    1,007.95x = 1,510.29 × 422.47
  4. Step 4: Simplify right side
    1,007.95x = 638,052.22
  5. Step 5: Solve for x
    x = 638,052.22/1,007.95
  6. Step 6: Final answer
    x = 633.02

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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.