Home / 2,019.90-2,788.11-1,430.70

Finding the Fourth Proportional to 2,019.90, 2,788.11 and 1,430.70

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Solution

The fourth proportional to 2,019.90, 2,788.11 and 1,430.70 is: 1,974.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,019.90 : 2,788.11 = 1,430.70 : x
  2. Step 2: Convert to fraction form
    2,019.90/2,788.11 = 1,430.70/x
  3. Step 3: Cross multiply
    2,019.90x = 2,788.11 × 1,430.70
  4. Step 4: Simplify right side
    2,019.90x = 3,988,948.98
  5. Step 5: Solve for x
    x = 3,988,948.98/2,019.90
  6. Step 6: Final answer
    x = 1,974.82

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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.