Home / 1,122.48-1,685.54-929.30

Finding the Fourth Proportional to 1,122.48, 1,685.54 and 929.30

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Solution

The fourth proportional to 1,122.48, 1,685.54 and 929.30 is: 1,395.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.48 : 1,685.54 = 929.30 : x
  2. Step 2: Convert to fraction form
    1,122.48/1,685.54 = 929.30/x
  3. Step 3: Cross multiply
    1,122.48x = 1,685.54 × 929.30
  4. Step 4: Simplify right side
    1,122.48x = 1,566,366.22
  5. Step 5: Solve for x
    x = 1,566,366.22/1,122.48
  6. Step 6: Final answer
    x = 1,395.45

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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.