Home / 1,877.58-2,590.65-1,247.40

Finding the Fourth Proportional to 1,877.58, 2,590.65 and 1,247.40

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Solution

The fourth proportional to 1,877.58, 2,590.65 and 1,247.40 is: 1,721.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,877.58 : 2,590.65 = 1,247.40 : x
  2. Step 2: Convert to fraction form
    1,877.58/2,590.65 = 1,247.40/x
  3. Step 3: Cross multiply
    1,877.58x = 2,590.65 × 1,247.40
  4. Step 4: Simplify right side
    1,877.58x = 3,231,576.81
  5. Step 5: Solve for x
    x = 3,231,576.81/1,877.58
  6. Step 6: Final answer
    x = 1,721.14

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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.