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Finding the Fourth Proportional to 353,649.65, 487,892.36 and 217,642.55

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Solution

The fourth proportional to 353,649.65, 487,892.36 and 217,642.55 is: 300,258.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,649.65 : 487,892.36 = 217,642.55 : x
  2. Step 2: Convert to fraction form
    353,649.65/487,892.36 = 217,642.55/x
  3. Step 3: Cross multiply
    353,649.65x = 487,892.36 × 217,642.55
  4. Step 4: Simplify right side
    353,649.65x = 106,186,135,460.56
  5. Step 5: Solve for x
    x = 106,186,135,460.56/353,649.65
  6. Step 6: Final answer
    x = 300,258.00

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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.