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Finding the Fourth Proportional to 1,337.90, 2,006.85 and 853.10

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Solution

The fourth proportional to 1,337.90, 2,006.85 and 853.10 is: 1,279.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,337.90 : 2,006.85 = 853.10 : x
  2. Step 2: Convert to fraction form
    1,337.90/2,006.85 = 853.10/x
  3. Step 3: Cross multiply
    1,337.90x = 2,006.85 × 853.10
  4. Step 4: Simplify right side
    1,337.90x = 1,712,043.74
  5. Step 5: Solve for x
    x = 1,712,043.74/1,337.90
  6. Step 6: Final answer
    x = 1,279.65

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Double scale
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Similar ratio
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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.