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Finding the Fourth Proportional to 1,156.26, 1,595.68 and 690.78

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Solution

The fourth proportional to 1,156.26, 1,595.68 and 690.78 is: 953.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,156.26 : 1,595.68 = 690.78 : x
  2. Step 2: Convert to fraction form
    1,156.26/1,595.68 = 690.78/x
  3. Step 3: Cross multiply
    1,156.26x = 1,595.68 × 690.78
  4. Step 4: Simplify right side
    1,156.26x = 1,102,263.83
  5. Step 5: Solve for x
    x = 1,102,263.83/1,156.26
  6. Step 6: Final answer
    x = 953.30

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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.