Home / 858,253.80-1,287,380.70-499,039.05

Finding the Fourth Proportional to 858,253.80, 1,287,380.70 and 499,039.05

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Solution

The fourth proportional to 858,253.80, 1,287,380.70 and 499,039.05 is: 748,558.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,253.80 : 1,287,380.70 = 499,039.05 : x
  2. Step 2: Convert to fraction form
    858,253.80/1,287,380.70 = 499,039.05/x
  3. Step 3: Cross multiply
    858,253.80x = 1,287,380.70 × 499,039.05
  4. Step 4: Simplify right side
    858,253.80x = 642,453,241,516.34
  5. Step 5: Solve for x
    x = 642,453,241,516.34/858,253.80
  6. Step 6: Final answer
    x = 748,558.58

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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.