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Finding the Fourth Proportional to 478,479.12, 717,735.60 and 253,535.76

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Solution

The fourth proportional to 478,479.12, 717,735.60 and 253,535.76 is: 380,312.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,479.12 : 717,735.60 = 253,535.76 : x
  2. Step 2: Convert to fraction form
    478,479.12/717,735.60 = 253,535.76/x
  3. Step 3: Cross multiply
    478,479.12x = 717,735.60 × 253,535.76
  4. Step 4: Simplify right side
    478,479.12x = 181,971,640,825.06
  5. Step 5: Solve for x
    x = 181,971,640,825.06/478,479.12
  6. Step 6: Final answer
    x = 380,312.61

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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.