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Finding the Fourth Proportional to 405,000.10, 607,500.15 and 272,289.70

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Solution

The fourth proportional to 405,000.10, 607,500.15 and 272,289.70 is: 408,434.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,000.10 : 607,500.15 = 272,289.70 : x
  2. Step 2: Convert to fraction form
    405,000.10/607,500.15 = 272,289.70/x
  3. Step 3: Cross multiply
    405,000.10x = 607,500.15 × 272,289.70
  4. Step 4: Simplify right side
    405,000.10x = 165,416,033,593.46
  5. Step 5: Solve for x
    x = 165,416,033,593.46/405,000.10
  6. Step 6: Final answer
    x = 408,434.55

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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.