Home / 1,981.81-2,972.10-1,590.89

Finding the Fourth Proportional to 1,981.81, 2,972.10 and 1,590.89

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Solution

The fourth proportional to 1,981.81, 2,972.10 and 1,590.89 is: 2,385.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.81 : 2,972.10 = 1,590.89 : x
  2. Step 2: Convert to fraction form
    1,981.81/2,972.10 = 1,590.89/x
  3. Step 3: Cross multiply
    1,981.81x = 2,972.10 × 1,590.89
  4. Step 4: Simplify right side
    1,981.81x = 4,728,269.31
  5. Step 5: Solve for x
    x = 4,728,269.31/1,981.81
  6. Step 6: Final answer
    x = 2,385.84

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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.