Home / 1,447.50-2,001.15-1,386.30

Finding the Fourth Proportional to 1,447.50, 2,001.15 and 1,386.30

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Solution

The fourth proportional to 1,447.50, 2,001.15 and 1,386.30 is: 1,916.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,447.50 : 2,001.15 = 1,386.30 : x
  2. Step 2: Convert to fraction form
    1,447.50/2,001.15 = 1,386.30/x
  3. Step 3: Cross multiply
    1,447.50x = 2,001.15 × 1,386.30
  4. Step 4: Simplify right side
    1,447.50x = 2,774,194.25
  5. Step 5: Solve for x
    x = 2,774,194.25/1,447.50
  6. Step 6: Final answer
    x = 1,916.54

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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.