Home / 621,008.60-931,512.90-408,432.20

Finding the Fourth Proportional to 621,008.60, 931,512.90 and 408,432.20

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Solution

The fourth proportional to 621,008.60, 931,512.90 and 408,432.20 is: 612,648.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,008.60 : 931,512.90 = 408,432.20 : x
  2. Step 2: Convert to fraction form
    621,008.60/931,512.90 = 408,432.20/x
  3. Step 3: Cross multiply
    621,008.60x = 931,512.90 × 408,432.20
  4. Step 4: Simplify right side
    621,008.60x = 380,459,863,075.38
  5. Step 5: Solve for x
    x = 380,459,863,075.38/621,008.60
  6. Step 6: Final answer
    x = 612,648.30

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Similar ratio
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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.