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Finding the Fourth Proportional to 798.90, 1,102.32 and 612.60

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Solution

The fourth proportional to 798.90, 1,102.32 and 612.60 is: 845.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.90 : 1,102.32 = 612.60 : x
  2. Step 2: Convert to fraction form
    798.90/1,102.32 = 612.60/x
  3. Step 3: Cross multiply
    798.90x = 1,102.32 × 612.60
  4. Step 4: Simplify right side
    798.90x = 675,281.23
  5. Step 5: Solve for x
    x = 675,281.23/798.90
  6. Step 6: Final answer
    x = 845.26

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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.