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Finding the Fourth Proportional to 272,285.40, 408,428.10 and 154,187.40

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Solution

The fourth proportional to 272,285.40, 408,428.10 and 154,187.40 is: 231,281.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,285.40 : 408,428.10 = 154,187.40 : x
  2. Step 2: Convert to fraction form
    272,285.40/408,428.10 = 154,187.40/x
  3. Step 3: Cross multiply
    272,285.40x = 408,428.10 × 154,187.40
  4. Step 4: Simplify right side
    272,285.40x = 62,974,466,825.94
  5. Step 5: Solve for x
    x = 62,974,466,825.94/272,285.40
  6. Step 6: Final answer
    x = 231,281.10

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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.