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Finding the Fourth Proportional to 869,751.70, 1,200,266.04 and 487,770.28

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Solution

The fourth proportional to 869,751.70, 1,200,266.04 and 487,770.28 is: 673,127.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,751.70 : 1,200,266.04 = 487,770.28 : x
  2. Step 2: Convert to fraction form
    869,751.70/1,200,266.04 = 487,770.28/x
  3. Step 3: Cross multiply
    869,751.70x = 1,200,266.04 × 487,770.28
  4. Step 4: Simplify right side
    869,751.70x = 585,454,102,405.29
  5. Step 5: Solve for x
    x = 585,454,102,405.29/869,751.70
  6. Step 6: Final answer
    x = 673,127.86

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.