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Finding the Fourth Proportional to 631.04, 940.48 and 618.24

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Solution

The fourth proportional to 631.04, 940.48 and 618.24 is: 921.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.04 : 940.48 = 618.24 : x
  2. Step 2: Convert to fraction form
    631.04/940.48 = 618.24/x
  3. Step 3: Cross multiply
    631.04x = 940.48 × 618.24
  4. Step 4: Simplify right side
    631.04x = 581,442.36
  5. Step 5: Solve for x
    x = 581,442.36/631.04
  6. Step 6: Final answer
    x = 921.40

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