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Finding the Fourth Proportional to 1,117.86, 1,542.29 and 698.19

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Solution

The fourth proportional to 1,117.86, 1,542.29 and 698.19 is: 963.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.86 : 1,542.29 = 698.19 : x
  2. Step 2: Convert to fraction form
    1,117.86/1,542.29 = 698.19/x
  3. Step 3: Cross multiply
    1,117.86x = 1,542.29 × 698.19
  4. Step 4: Simplify right side
    1,117.86x = 1,076,807.96
  5. Step 5: Solve for x
    x = 1,076,807.96/1,117.86
  6. Step 6: Final answer
    x = 963.28

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Half scale
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Double scale
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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.