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Finding the Fourth Proportional to 488,416.90, 731,641.20 and 328,984.60

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Solution

The fourth proportional to 488,416.90, 731,641.20 and 328,984.60 is: 492,814.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,416.90 : 731,641.20 = 328,984.60 : x
  2. Step 2: Convert to fraction form
    488,416.90/731,641.20 = 328,984.60/x
  3. Step 3: Cross multiply
    488,416.90x = 731,641.20 × 328,984.60
  4. Step 4: Simplify right side
    488,416.90x = 240,698,687,525.52
  5. Step 5: Solve for x
    x = 240,698,687,525.52/488,416.90
  6. Step 6: Final answer
    x = 492,814.00

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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.