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Finding the Fourth Proportional to 1,552.32, 2,142.19 and 853.69

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Solution

The fourth proportional to 1,552.32, 2,142.19 and 853.69 is: 1,178.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,552.32 : 2,142.19 = 853.69 : x
  2. Step 2: Convert to fraction form
    1,552.32/2,142.19 = 853.69/x
  3. Step 3: Cross multiply
    1,552.32x = 2,142.19 × 853.69
  4. Step 4: Simplify right side
    1,552.32x = 1,828,766.18
  5. Step 5: Solve for x
    x = 1,828,766.18/1,552.32
  6. Step 6: Final answer
    x = 1,178.09

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Half scale
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Double scale
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1.5x scale

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.