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Finding the Fourth Proportional to 710.58, 980.45 and 400.02

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Solution

The fourth proportional to 710.58, 980.45 and 400.02 is: 551.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.58 : 980.45 = 400.02 : x
  2. Step 2: Convert to fraction form
    710.58/980.45 = 400.02/x
  3. Step 3: Cross multiply
    710.58x = 980.45 × 400.02
  4. Step 4: Simplify right side
    710.58x = 392,199.61
  5. Step 5: Solve for x
    x = 392,199.61/710.58
  6. Step 6: Final answer
    x = 551.94

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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.