Home / 1,929.80-2,663.40-1,090.76

Finding the Fourth Proportional to 1,929.80, 2,663.40 and 1,090.76

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Solution

The fourth proportional to 1,929.80, 2,663.40 and 1,090.76 is: 1,505.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,929.80 : 2,663.40 = 1,090.76 : x
  2. Step 2: Convert to fraction form
    1,929.80/2,663.40 = 1,090.76/x
  3. Step 3: Cross multiply
    1,929.80x = 2,663.40 × 1,090.76
  4. Step 4: Simplify right side
    1,929.80x = 2,905,130.18
  5. Step 5: Solve for x
    x = 2,905,130.18/1,929.80
  6. Step 6: Final answer
    x = 1,505.40

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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.