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Finding the Fourth Proportional to 1,000.33, 1,488.61 and 961.45

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Solution

The fourth proportional to 1,000.33, 1,488.61 and 961.45 is: 1,430.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,000.33 : 1,488.61 = 961.45 : x
  2. Step 2: Convert to fraction form
    1,000.33/1,488.61 = 961.45/x
  3. Step 3: Cross multiply
    1,000.33x = 1,488.61 × 961.45
  4. Step 4: Simplify right side
    1,000.33x = 1,431,226.49
  5. Step 5: Solve for x
    x = 1,431,226.49/1,000.33
  6. Step 6: Final answer
    x = 1,430.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.