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Finding the Fourth Proportional to 912.04, 1,258.58 and 498.04

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Solution

The fourth proportional to 912.04, 1,258.58 and 498.04 is: 687.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.04 : 1,258.58 = 498.04 : x
  2. Step 2: Convert to fraction form
    912.04/1,258.58 = 498.04/x
  3. Step 3: Cross multiply
    912.04x = 1,258.58 × 498.04
  4. Step 4: Simplify right side
    912.04x = 626,823.18
  5. Step 5: Solve for x
    x = 626,823.18/912.04
  6. Step 6: Final answer
    x = 687.28

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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.