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Finding the Fourth Proportional to 486,640, 666,685.60 and 468,445.98

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Solution

The fourth proportional to 486,640, 666,685.60 and 468,445.98 is: 641,760.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,640 : 666,685.60 = 468,445.98 : x
  2. Step 2: Convert to fraction form
    486,640/666,685.60 = 468,445.98/x
  3. Step 3: Cross multiply
    486,640x = 666,685.60 × 468,445.98
  4. Step 4: Simplify right side
    486,640x = 312,306,189,243.89
  5. Step 5: Solve for x
    x = 312,306,189,243.89/486,640
  6. Step 6: Final answer
    x = 641,760.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.