Home / 1,320.58-1,981.74-551.08

Finding the Fourth Proportional to 1,320.58, 1,981.74 and 551.08

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Solution

The fourth proportional to 1,320.58, 1,981.74 and 551.08 is: 826.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.58 : 1,981.74 = 551.08 : x
  2. Step 2: Convert to fraction form
    1,320.58/1,981.74 = 551.08/x
  3. Step 3: Cross multiply
    1,320.58x = 1,981.74 × 551.08
  4. Step 4: Simplify right side
    1,320.58x = 1,092,097.28
  5. Step 5: Solve for x
    x = 1,092,097.28/1,320.58
  6. Step 6: Final answer
    x = 826.98

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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.