Home / 1,240.02-1,710.60-742.50

Finding the Fourth Proportional to 1,240.02, 1,710.60 and 742.50

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Solution

The fourth proportional to 1,240.02, 1,710.60 and 742.50 is: 1,024.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.02 : 1,710.60 = 742.50 : x
  2. Step 2: Convert to fraction form
    1,240.02/1,710.60 = 742.50/x
  3. Step 3: Cross multiply
    1,240.02x = 1,710.60 × 742.50
  4. Step 4: Simplify right side
    1,240.02x = 1,270,120.50
  5. Step 5: Solve for x
    x = 1,270,120.50/1,240.02
  6. Step 6: Final answer
    x = 1,024.27

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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.