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Finding the Fourth Proportional to 1,946.89, 2,921.15 and 972.46

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Solution

The fourth proportional to 1,946.89, 2,921.15 and 972.46 is: 1,459.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,946.89 : 2,921.15 = 972.46 : x
  2. Step 2: Convert to fraction form
    1,946.89/2,921.15 = 972.46/x
  3. Step 3: Cross multiply
    1,946.89x = 2,921.15 × 972.46
  4. Step 4: Simplify right side
    1,946.89x = 2,840,701.53
  5. Step 5: Solve for x
    x = 2,840,701.53/1,946.89
  6. Step 6: Final answer
    x = 1,459.10

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1.5x scale

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.