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Finding the Fourth Proportional to 1,135.12, 1,566.53 and 693

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Solution

The fourth proportional to 1,135.12, 1,566.53 and 693 is: 956.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,135.12 : 1,566.53 = 693 : x
  2. Step 2: Convert to fraction form
    1,135.12/1,566.53 = 693/x
  3. Step 3: Cross multiply
    1,135.12x = 1,566.53 × 693
  4. Step 4: Simplify right side
    1,135.12x = 1,085,605.29
  5. Step 5: Solve for x
    x = 1,085,605.29/1,135.12
  6. Step 6: Final answer
    x = 956.38

Related Problems

Find fourth proportional to 567.56, 783.27 and 346.50
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.