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Finding the Fourth Proportional to 388.55, 583.05 and 358.48

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Solution

The fourth proportional to 388.55, 583.05 and 358.48 is: 537.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.55 : 583.05 = 358.48 : x
  2. Step 2: Convert to fraction form
    388.55/583.05 = 358.48/x
  3. Step 3: Cross multiply
    388.55x = 583.05 × 358.48
  4. Step 4: Simplify right side
    388.55x = 209,013.84
  5. Step 5: Solve for x
    x = 209,013.84/388.55
  6. Step 6: Final answer
    x = 537.93

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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.