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Finding the Fourth Proportional to 2,985.60, 4,119.76 and 1,658.88

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Solution

The fourth proportional to 2,985.60, 4,119.76 and 1,658.88 is: 2,289.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985.60 : 4,119.76 = 1,658.88 : x
  2. Step 2: Convert to fraction form
    2,985.60/4,119.76 = 1,658.88/x
  3. Step 3: Cross multiply
    2,985.60x = 4,119.76 × 1,658.88
  4. Step 4: Simplify right side
    2,985.60x = 6,834,187.47
  5. Step 5: Solve for x
    x = 6,834,187.47/2,985.60
  6. Step 6: Final answer
    x = 2,289.05

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1.5x scale

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.