Home / 781,346.70-1,170,270.45-641,378.70

Finding the Fourth Proportional to 781,346.70, 1,170,270.45 and 641,378.70

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Solution

The fourth proportional to 781,346.70, 1,170,270.45 and 641,378.70 is: 960,631.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,346.70 : 1,170,270.45 = 641,378.70 : x
  2. Step 2: Convert to fraction form
    781,346.70/1,170,270.45 = 641,378.70/x
  3. Step 3: Cross multiply
    781,346.70x = 1,170,270.45 × 641,378.70
  4. Step 4: Simplify right side
    781,346.70x = 750,586,539,869.42
  5. Step 5: Solve for x
    x = 750,586,539,869.42/781,346.70
  6. Step 6: Final answer
    x = 960,631.87

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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.