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Finding the Fourth Proportional to 458.04, 686.52 and 386.04

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Solution

The fourth proportional to 458.04, 686.52 and 386.04 is: 578.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.04 : 686.52 = 386.04 : x
  2. Step 2: Convert to fraction form
    458.04/686.52 = 386.04/x
  3. Step 3: Cross multiply
    458.04x = 686.52 × 386.04
  4. Step 4: Simplify right side
    458.04x = 265,024.18
  5. Step 5: Solve for x
    x = 265,024.18/458.04
  6. Step 6: Final answer
    x = 578.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.