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Finding the Fourth Proportional to 889.17, 1,225.11 and 664.17

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Solution

The fourth proportional to 889.17, 1,225.11 and 664.17 is: 915.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.17 : 1,225.11 = 664.17 : x
  2. Step 2: Convert to fraction form
    889.17/1,225.11 = 664.17/x
  3. Step 3: Cross multiply
    889.17x = 1,225.11 × 664.17
  4. Step 4: Simplify right side
    889.17x = 813,681.31
  5. Step 5: Solve for x
    x = 813,681.31/889.17
  6. Step 6: Final answer
    x = 915.10

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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.