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Finding the Fourth Proportional to 257,070.60, 385,605.90 and 217,801.80

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Solution

The fourth proportional to 257,070.60, 385,605.90 and 217,801.80 is: 326,702.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,070.60 : 385,605.90 = 217,801.80 : x
  2. Step 2: Convert to fraction form
    257,070.60/385,605.90 = 217,801.80/x
  3. Step 3: Cross multiply
    257,070.60x = 385,605.90 × 217,801.80
  4. Step 4: Simplify right side
    257,070.60x = 83,985,659,110.62
  5. Step 5: Solve for x
    x = 83,985,659,110.62/257,070.60
  6. Step 6: Final answer
    x = 326,702.70

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1.5x scale

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.