Home / 1,140.14-1,708.55-619.70

Finding the Fourth Proportional to 1,140.14, 1,708.55 and 619.70

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Solution

The fourth proportional to 1,140.14, 1,708.55 and 619.70 is: 928.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.14 : 1,708.55 = 619.70 : x
  2. Step 2: Convert to fraction form
    1,140.14/1,708.55 = 619.70/x
  3. Step 3: Cross multiply
    1,140.14x = 1,708.55 × 619.70
  4. Step 4: Simplify right side
    1,140.14x = 1,058,779.89
  5. Step 5: Solve for x
    x = 1,058,779.89/1,140.14
  6. Step 6: Final answer
    x = 928.64

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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.