Home / 2,430.20-3,642.60-1,390.70

Finding the Fourth Proportional to 2,430.20, 3,642.60 and 1,390.70

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Solution

The fourth proportional to 2,430.20, 3,642.60 and 1,390.70 is: 2,084.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,430.20 : 3,642.60 = 1,390.70 : x
  2. Step 2: Convert to fraction form
    2,430.20/3,642.60 = 1,390.70/x
  3. Step 3: Cross multiply
    2,430.20x = 3,642.60 × 1,390.70
  4. Step 4: Simplify right side
    2,430.20x = 5,065,763.82
  5. Step 5: Solve for x
    x = 5,065,763.82/2,430.20
  6. Step 6: Final answer
    x = 2,084.50

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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.