Home / 689,364.80-1,034,144.40-216,000.80

Finding the Fourth Proportional to 689,364.80, 1,034,144.40 and 216,000.80

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Solution

The fourth proportional to 689,364.80, 1,034,144.40 and 216,000.80 is: 324,031.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,364.80 : 1,034,144.40 = 216,000.80 : x
  2. Step 2: Convert to fraction form
    689,364.80/1,034,144.40 = 216,000.80/x
  3. Step 3: Cross multiply
    689,364.80x = 1,034,144.40 × 216,000.80
  4. Step 4: Simplify right side
    689,364.80x = 223,376,017,715.52
  5. Step 5: Solve for x
    x = 223,376,017,715.52/689,364.80
  6. Step 6: Final answer
    x = 324,031.66

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.