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Finding the Fourth Proportional to 526,866.60, 727,029.90 and 311,968.20

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Solution

The fourth proportional to 526,866.60, 727,029.90 and 311,968.20 is: 430,488.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    526,866.60 : 727,029.90 = 311,968.20 : x
  2. Step 2: Convert to fraction form
    526,866.60/727,029.90 = 311,968.20/x
  3. Step 3: Cross multiply
    526,866.60x = 727,029.90 × 311,968.20
  4. Step 4: Simplify right side
    526,866.60x = 226,810,209,249.18
  5. Step 5: Solve for x
    x = 226,810,209,249.18/526,866.60
  6. Step 6: Final answer
    x = 430,488.87

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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.