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Finding the Fourth Proportional to 1,140.97, 1,703.12 and 979.69

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Solution

The fourth proportional to 1,140.97, 1,703.12 and 979.69 is: 1,462.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.97 : 1,703.12 = 979.69 : x
  2. Step 2: Convert to fraction form
    1,140.97/1,703.12 = 979.69/x
  3. Step 3: Cross multiply
    1,140.97x = 1,703.12 × 979.69
  4. Step 4: Simplify right side
    1,140.97x = 1,668,529.63
  5. Step 5: Solve for x
    x = 1,668,529.63/1,140.97
  6. Step 6: Final answer
    x = 1,462.38

Related Problems

Find fourth proportional to 570.49, 851.56 and 489.85
Half scale
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Double scale
Find fourth proportional to 1,141.97, 1,704.61 and 980.69
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.