Home / 430,001.70-645,002.55-272,408.10

Finding the Fourth Proportional to 430,001.70, 645,002.55 and 272,408.10

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Solution

The fourth proportional to 430,001.70, 645,002.55 and 272,408.10 is: 408,612.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,001.70 : 645,002.55 = 272,408.10 : x
  2. Step 2: Convert to fraction form
    430,001.70/645,002.55 = 272,408.10/x
  3. Step 3: Cross multiply
    430,001.70x = 645,002.55 × 272,408.10
  4. Step 4: Simplify right side
    430,001.70x = 175,703,919,140.66
  5. Step 5: Solve for x
    x = 175,703,919,140.66/430,001.70
  6. Step 6: Final answer
    x = 408,612.15

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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.