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Finding the Fourth Proportional to 371,143.20, 556,714.80 and 317,999.10

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Solution

The fourth proportional to 371,143.20, 556,714.80 and 317,999.10 is: 476,998.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,143.20 : 556,714.80 = 317,999.10 : x
  2. Step 2: Convert to fraction form
    371,143.20/556,714.80 = 317,999.10/x
  3. Step 3: Cross multiply
    371,143.20x = 556,714.80 × 317,999.10
  4. Step 4: Simplify right side
    371,143.20x = 177,034,805,356.68
  5. Step 5: Solve for x
    x = 177,034,805,356.68/371,143.20
  6. Step 6: Final answer
    x = 476,998.65

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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.