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Finding the Fourth Proportional to 1,323.34, 1,985.12 and 349.45

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Solution

The fourth proportional to 1,323.34, 1,985.12 and 349.45 is: 524.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,323.34 : 1,985.12 = 349.45 : x
  2. Step 2: Convert to fraction form
    1,323.34/1,985.12 = 349.45/x
  3. Step 3: Cross multiply
    1,323.34x = 1,985.12 × 349.45
  4. Step 4: Simplify right side
    1,323.34x = 693,700.18
  5. Step 5: Solve for x
    x = 693,700.18/1,323.34
  6. Step 6: Final answer
    x = 524.20

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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.