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Finding the Fourth Proportional to 1,442.02, 1,990.14 and 852.76

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Solution

The fourth proportional to 1,442.02, 1,990.14 and 852.76 is: 1,176.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,442.02 : 1,990.14 = 852.76 : x
  2. Step 2: Convert to fraction form
    1,442.02/1,990.14 = 852.76/x
  3. Step 3: Cross multiply
    1,442.02x = 1,990.14 × 852.76
  4. Step 4: Simplify right side
    1,442.02x = 1,697,111.79
  5. Step 5: Solve for x
    x = 1,697,111.79/1,442.02
  6. Step 6: Final answer
    x = 1,176.90

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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.