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Finding the Fourth Proportional to 888.32, 1,226 and 515.28

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Solution

The fourth proportional to 888.32, 1,226 and 515.28 is: 711.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.32 : 1,226 = 515.28 : x
  2. Step 2: Convert to fraction form
    888.32/1,226 = 515.28/x
  3. Step 3: Cross multiply
    888.32x = 1,226 × 515.28
  4. Step 4: Simplify right side
    888.32x = 631,733.28
  5. Step 5: Solve for x
    x = 631,733.28/888.32
  6. Step 6: Final answer
    x = 711.16

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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.