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Finding the Fourth Proportional to 317,718.60, 438,342.01 and 203,064.33

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Solution

The fourth proportional to 317,718.60, 438,342.01 and 203,064.33 is: 280,158.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,718.60 : 438,342.01 = 203,064.33 : x
  2. Step 2: Convert to fraction form
    317,718.60/438,342.01 = 203,064.33/x
  3. Step 3: Cross multiply
    317,718.60x = 438,342.01 × 203,064.33
  4. Step 4: Simplify right side
    317,718.60x = 89,011,626,571.50
  5. Step 5: Solve for x
    x = 89,011,626,571.50/317,718.60
  6. Step 6: Final answer
    x = 280,158.69

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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.