Home / 2,478.72-3,421.80-1,430.60

Finding the Fourth Proportional to 2,478.72, 3,421.80 and 1,430.60

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Solution

The fourth proportional to 2,478.72, 3,421.80 and 1,430.60 is: 1,974.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,478.72 : 3,421.80 = 1,430.60 : x
  2. Step 2: Convert to fraction form
    2,478.72/3,421.80 = 1,430.60/x
  3. Step 3: Cross multiply
    2,478.72x = 3,421.80 × 1,430.60
  4. Step 4: Simplify right side
    2,478.72x = 4,895,227.08
  5. Step 5: Solve for x
    x = 4,895,227.08/2,478.72
  6. Step 6: Final answer
    x = 1,974.90

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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.