Home / 430,279.20-645,418.80-272,685.60

Finding the Fourth Proportional to 430,279.20, 645,418.80 and 272,685.60

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Solution

The fourth proportional to 430,279.20, 645,418.80 and 272,685.60 is: 409,028.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,279.20 : 645,418.80 = 272,685.60 : x
  2. Step 2: Convert to fraction form
    430,279.20/645,418.80 = 272,685.60/x
  3. Step 3: Cross multiply
    430,279.20x = 645,418.80 × 272,685.60
  4. Step 4: Simplify right side
    430,279.20x = 175,996,412,729.28
  5. Step 5: Solve for x
    x = 175,996,412,729.28/430,279.20
  6. Step 6: Final answer
    x = 409,028.40

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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.