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Finding the Fourth Proportional to 405,000.10, 607,500.15 and 279,028.90

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Solution

The fourth proportional to 405,000.10, 607,500.15 and 279,028.90 is: 418,543.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,000.10 : 607,500.15 = 279,028.90 : x
  2. Step 2: Convert to fraction form
    405,000.10/607,500.15 = 279,028.90/x
  3. Step 3: Cross multiply
    405,000.10x = 607,500.15 × 279,028.90
  4. Step 4: Simplify right side
    405,000.10x = 169,510,098,604.34
  5. Step 5: Solve for x
    x = 169,510,098,604.34/405,000.10
  6. Step 6: Final answer
    x = 418,543.35

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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.