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Finding the Fourth Proportional to 653,911.08, 980,860.32 and 387,479.82

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Solution

The fourth proportional to 653,911.08, 980,860.32 and 387,479.82 is: 581,216.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,911.08 : 980,860.32 = 387,479.82 : x
  2. Step 2: Convert to fraction form
    653,911.08/980,860.32 = 387,479.82/x
  3. Step 3: Cross multiply
    653,911.08x = 980,860.32 × 387,479.82
  4. Step 4: Simplify right side
    653,911.08x = 380,063,580,238.74
  5. Step 5: Solve for x
    x = 380,063,580,238.74/653,911.08
  6. Step 6: Final answer
    x = 581,216.00

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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.