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Finding the Fourth Proportional to 1,130.70, 1,559.82 and 710.85

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Solution

The fourth proportional to 1,130.70, 1,559.82 and 710.85 is: 980.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,130.70 : 1,559.82 = 710.85 : x
  2. Step 2: Convert to fraction form
    1,130.70/1,559.82 = 710.85/x
  3. Step 3: Cross multiply
    1,130.70x = 1,559.82 × 710.85
  4. Step 4: Simplify right side
    1,130.70x = 1,108,798.05
  5. Step 5: Solve for x
    x = 1,108,798.05/1,130.70
  6. Step 6: Final answer
    x = 980.63

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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.