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Finding the Fourth Proportional to 590,388.20, 885,711.90 and 291,012.20

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Solution

The fourth proportional to 590,388.20, 885,711.90 and 291,012.20 is: 436,582.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    590,388.20 : 885,711.90 = 291,012.20 : x
  2. Step 2: Convert to fraction form
    590,388.20/885,711.90 = 291,012.20/x
  3. Step 3: Cross multiply
    590,388.20x = 885,711.90 × 291,012.20
  4. Step 4: Simplify right side
    590,388.20x = 257,752,968,585.18
  5. Step 5: Solve for x
    x = 257,752,968,585.18/590,388.20
  6. Step 6: Final answer
    x = 436,582.18

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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.