Home / 1,042.80-1,437.60-649.56

Finding the Fourth Proportional to 1,042.80, 1,437.60 and 649.56

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Solution

The fourth proportional to 1,042.80, 1,437.60 and 649.56 is: 895.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,042.80 : 1,437.60 = 649.56 : x
  2. Step 2: Convert to fraction form
    1,042.80/1,437.60 = 649.56/x
  3. Step 3: Cross multiply
    1,042.80x = 1,437.60 × 649.56
  4. Step 4: Simplify right side
    1,042.80x = 933,807.46
  5. Step 5: Solve for x
    x = 933,807.46/1,042.80
  6. Step 6: Final answer
    x = 895.48

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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.