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Finding the Fourth Proportional to 623.16, 928.80 and 618.03

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Solution

The fourth proportional to 623.16, 928.80 and 618.03 is: 921.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.16 : 928.80 = 618.03 : x
  2. Step 2: Convert to fraction form
    623.16/928.80 = 618.03/x
  3. Step 3: Cross multiply
    623.16x = 928.80 × 618.03
  4. Step 4: Simplify right side
    623.16x = 574,026.26
  5. Step 5: Solve for x
    x = 574,026.26/623.16
  6. Step 6: Final answer
    x = 921.15

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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.