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Finding the Fourth Proportional to 840.10, 1,260.75 and 469.52

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Solution

The fourth proportional to 840.10, 1,260.75 and 469.52 is: 704.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    840.10 : 1,260.75 = 469.52 : x
  2. Step 2: Convert to fraction form
    840.10/1,260.75 = 469.52/x
  3. Step 3: Cross multiply
    840.10x = 1,260.75 × 469.52
  4. Step 4: Simplify right side
    840.10x = 591,947.34
  5. Step 5: Solve for x
    x = 591,947.34/840.10
  6. Step 6: Final answer
    x = 704.62

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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.