Home / 2,430.90-3,640.95-1,275.30

Finding the Fourth Proportional to 2,430.90, 3,640.95 and 1,275.30

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Solution

The fourth proportional to 2,430.90, 3,640.95 and 1,275.30 is: 1,910.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,430.90 : 3,640.95 = 1,275.30 : x
  2. Step 2: Convert to fraction form
    2,430.90/3,640.95 = 1,275.30/x
  3. Step 3: Cross multiply
    2,430.90x = 3,640.95 × 1,275.30
  4. Step 4: Simplify right side
    2,430.90x = 4,643,303.54
  5. Step 5: Solve for x
    x = 4,643,303.54/2,430.90
  6. Step 6: Final answer
    x = 1,910.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.