Home / 1,985.81-2,740.22-1,146.78

Finding the Fourth Proportional to 1,985.81, 2,740.22 and 1,146.78

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Solution

The fourth proportional to 1,985.81, 2,740.22 and 1,146.78 is: 1,582.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.81 : 2,740.22 = 1,146.78 : x
  2. Step 2: Convert to fraction form
    1,985.81/2,740.22 = 1,146.78/x
  3. Step 3: Cross multiply
    1,985.81x = 2,740.22 × 1,146.78
  4. Step 4: Simplify right side
    1,985.81x = 3,142,423.76
  5. Step 5: Solve for x
    x = 3,142,423.76/1,985.81
  6. Step 6: Final answer
    x = 1,582.44

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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.