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Finding the Fourth Proportional to 933.49, 1,388.35 and 915.06

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Solution

The fourth proportional to 933.49, 1,388.35 and 915.06 is: 1,360.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.49 : 1,388.35 = 915.06 : x
  2. Step 2: Convert to fraction form
    933.49/1,388.35 = 915.06/x
  3. Step 3: Cross multiply
    933.49x = 1,388.35 × 915.06
  4. Step 4: Simplify right side
    933.49x = 1,270,423.55
  5. Step 5: Solve for x
    x = 1,270,423.55/933.49
  6. Step 6: Final answer
    x = 1,360.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.