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Finding the Fourth Proportional to 638,990.60, 881,810.01 and 352,510.61

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Solution

The fourth proportional to 638,990.60, 881,810.01 and 352,510.61 is: 486,466.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,990.60 : 881,810.01 = 352,510.61 : x
  2. Step 2: Convert to fraction form
    638,990.60/881,810.01 = 352,510.61/x
  3. Step 3: Cross multiply
    638,990.60x = 881,810.01 × 352,510.61
  4. Step 4: Simplify right side
    638,990.60x = 310,847,380,120.16
  5. Step 5: Solve for x
    x = 310,847,380,120.16/638,990.60
  6. Step 6: Final answer
    x = 486,466.28

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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.