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Finding the Fourth Proportional to 405,000.30, 607,500.45 and 279,029.10

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Solution

The fourth proportional to 405,000.30, 607,500.45 and 279,029.10 is: 418,543.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,000.30 : 607,500.45 = 279,029.10 : x
  2. Step 2: Convert to fraction form
    405,000.30/607,500.45 = 279,029.10/x
  3. Step 3: Cross multiply
    405,000.30x = 607,500.45 × 279,029.10
  4. Step 4: Simplify right side
    405,000.30x = 169,510,303,813.10
  5. Step 5: Solve for x
    x = 169,510,303,813.10/405,000.30
  6. Step 6: Final answer
    x = 418,543.65

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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.