Home / 739,378.20-1,109,063.70-289,781.40

Finding the Fourth Proportional to 739,378.20, 1,109,063.70 and 289,781.40

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Solution

The fourth proportional to 739,378.20, 1,109,063.70 and 289,781.40 is: 434,670.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,378.20 : 1,109,063.70 = 289,781.40 : x
  2. Step 2: Convert to fraction form
    739,378.20/1,109,063.70 = 289,781.40/x
  3. Step 3: Cross multiply
    739,378.20x = 1,109,063.70 × 289,781.40
  4. Step 4: Simplify right side
    739,378.20x = 321,386,031,675.18
  5. Step 5: Solve for x
    x = 321,386,031,675.18/739,378.20
  6. Step 6: Final answer
    x = 434,670.69

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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.