Home / 430,019.20-645,028.80-272,425.60

Finding the Fourth Proportional to 430,019.20, 645,028.80 and 272,425.60

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Solution

The fourth proportional to 430,019.20, 645,028.80 and 272,425.60 is: 408,638.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,019.20 : 645,028.80 = 272,425.60 : x
  2. Step 2: Convert to fraction form
    430,019.20/645,028.80 = 272,425.60/x
  3. Step 3: Cross multiply
    430,019.20x = 645,028.80 × 272,425.60
  4. Step 4: Simplify right side
    430,019.20x = 175,722,357,857.28
  5. Step 5: Solve for x
    x = 175,722,357,857.28/430,019.20
  6. Step 6: Final answer
    x = 408,638.40

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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.