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Finding the Fourth Proportional to 869,841.76, 1,200,390.08 and 487,860.48

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Solution

The fourth proportional to 869,841.76, 1,200,390.08 and 487,860.48 is: 673,252.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,841.76 : 1,200,390.08 = 487,860.48 : x
  2. Step 2: Convert to fraction form
    869,841.76/1,200,390.08 = 487,860.48/x
  3. Step 3: Cross multiply
    869,841.76x = 1,200,390.08 × 487,860.48
  4. Step 4: Simplify right side
    869,841.76x = 585,622,880,616.04
  5. Step 5: Solve for x
    x = 585,622,880,616.04/869,841.76
  6. Step 6: Final answer
    x = 673,252.20

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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.