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Finding the Fourth Proportional to 984.58, 1,475.38 and 710.40

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Solution

The fourth proportional to 984.58, 1,475.38 and 710.40 is: 1,064.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.58 : 1,475.38 = 710.40 : x
  2. Step 2: Convert to fraction form
    984.58/1,475.38 = 710.40/x
  3. Step 3: Cross multiply
    984.58x = 1,475.38 × 710.40
  4. Step 4: Simplify right side
    984.58x = 1,048,109.95
  5. Step 5: Solve for x
    x = 1,048,109.95/984.58
  6. Step 6: Final answer
    x = 1,064.52

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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.