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Finding the Fourth Proportional to 478,883.82, 660,875.61 and 285,265.08

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Solution

The fourth proportional to 478,883.82, 660,875.61 and 285,265.08 is: 393,675.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,883.82 : 660,875.61 = 285,265.08 : x
  2. Step 2: Convert to fraction form
    478,883.82/660,875.61 = 285,265.08/x
  3. Step 3: Cross multiply
    478,883.82x = 660,875.61 × 285,265.08
  4. Step 4: Simplify right side
    478,883.82x = 188,524,733,756.70
  5. Step 5: Solve for x
    x = 188,524,733,756.70/478,883.82
  6. Step 6: Final answer
    x = 393,675.30

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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.