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Finding the Fourth Proportional to 972.03, 1,458.20 and 355.60

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Solution

The fourth proportional to 972.03, 1,458.20 and 355.60 is: 533.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.03 : 1,458.20 = 355.60 : x
  2. Step 2: Convert to fraction form
    972.03/1,458.20 = 355.60/x
  3. Step 3: Cross multiply
    972.03x = 1,458.20 × 355.60
  4. Step 4: Simplify right side
    972.03x = 518,530.50
  5. Step 5: Solve for x
    x = 518,530.50/972.03
  6. Step 6: Final answer
    x = 533.45

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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.