Home / 1,761.20-2,430.42-975.30

Finding the Fourth Proportional to 1,761.20, 2,430.42 and 975.30

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Solution

The fourth proportional to 1,761.20, 2,430.42 and 975.30 is: 1,345.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,761.20 : 2,430.42 = 975.30 : x
  2. Step 2: Convert to fraction form
    1,761.20/2,430.42 = 975.30/x
  3. Step 3: Cross multiply
    1,761.20x = 2,430.42 × 975.30
  4. Step 4: Simplify right side
    1,761.20x = 2,370,388.63
  5. Step 5: Solve for x
    x = 2,370,388.63/1,761.20
  6. Step 6: Final answer
    x = 1,345.89

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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.