Home / 1,442.04-1,989.42-918.36

Finding the Fourth Proportional to 1,442.04, 1,989.42 and 918.36

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Solution

The fourth proportional to 1,442.04, 1,989.42 and 918.36 is: 1,266.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,442.04 : 1,989.42 = 918.36 : x
  2. Step 2: Convert to fraction form
    1,442.04/1,989.42 = 918.36/x
  3. Step 3: Cross multiply
    1,442.04x = 1,989.42 × 918.36
  4. Step 4: Simplify right side
    1,442.04x = 1,827,003.75
  5. Step 5: Solve for x
    x = 1,827,003.75/1,442.04
  6. Step 6: Final answer
    x = 1,266.96

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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.