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Finding the Fourth Proportional to 1,000.07, 1,500.31 and 422.94

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Solution

The fourth proportional to 1,000.07, 1,500.31 and 422.94 is: 634.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,000.07 : 1,500.31 = 422.94 : x
  2. Step 2: Convert to fraction form
    1,000.07/1,500.31 = 422.94/x
  3. Step 3: Cross multiply
    1,000.07x = 1,500.31 × 422.94
  4. Step 4: Simplify right side
    1,000.07x = 634,541.11
  5. Step 5: Solve for x
    x = 634,541.11/1,000.07
  6. Step 6: Final answer
    x = 634.50

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1.5x scale

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.