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Finding the Fourth Proportional to 509,479.50, 702,340.70 and 356,041.32

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Solution

The fourth proportional to 509,479.50, 702,340.70 and 356,041.32 is: 490,819.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,479.50 : 702,340.70 = 356,041.32 : x
  2. Step 2: Convert to fraction form
    509,479.50/702,340.70 = 356,041.32/x
  3. Step 3: Cross multiply
    509,479.50x = 702,340.70 × 356,041.32
  4. Step 4: Simplify right side
    509,479.50x = 250,062,309,917.72
  5. Step 5: Solve for x
    x = 250,062,309,917.72/509,479.50
  6. Step 6: Final answer
    x = 490,819.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.