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Finding the Fourth Proportional to 1,112.77, 1,535.55 and 615.37

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Solution

The fourth proportional to 1,112.77, 1,535.55 and 615.37 is: 849.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.77 : 1,535.55 = 615.37 : x
  2. Step 2: Convert to fraction form
    1,112.77/1,535.55 = 615.37/x
  3. Step 3: Cross multiply
    1,112.77x = 1,535.55 × 615.37
  4. Step 4: Simplify right side
    1,112.77x = 944,923.73
  5. Step 5: Solve for x
    x = 944,923.73/1,112.77
  6. Step 6: Final answer
    x = 849.17

Related Problems

Find fourth proportional to 556.38, 767.78 and 307.68
Half scale
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Double scale
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Similar ratio
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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.