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Finding the Fourth Proportional to 1,442.79, 1,990.53 and 882.90

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Solution

The fourth proportional to 1,442.79, 1,990.53 and 882.90 is: 1,218.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,442.79 : 1,990.53 = 882.90 : x
  2. Step 2: Convert to fraction form
    1,442.79/1,990.53 = 882.90/x
  3. Step 3: Cross multiply
    1,442.79x = 1,990.53 × 882.90
  4. Step 4: Simplify right side
    1,442.79x = 1,757,438.94
  5. Step 5: Solve for x
    x = 1,757,438.94/1,442.79
  6. Step 6: Final answer
    x = 1,218.08

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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.