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Finding the Fourth Proportional to 1,135.01, 1,566.62 and 686.89

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Solution

The fourth proportional to 1,135.01, 1,566.62 and 686.89 is: 948.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,135.01 : 1,566.62 = 686.89 : x
  2. Step 2: Convert to fraction form
    1,135.01/1,566.62 = 686.89/x
  3. Step 3: Cross multiply
    1,135.01x = 1,566.62 × 686.89
  4. Step 4: Simplify right side
    1,135.01x = 1,076,087.90
  5. Step 5: Solve for x
    x = 1,076,087.90/1,135.01
  6. Step 6: Final answer
    x = 948.08

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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.