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Finding the Fourth Proportional to 488,362.80, 731,913.48 and 393,636.72

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Solution

The fourth proportional to 488,362.80, 731,913.48 and 393,636.72 is: 589,946.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,362.80 : 731,913.48 = 393,636.72 : x
  2. Step 2: Convert to fraction form
    488,362.80/731,913.48 = 393,636.72/x
  3. Step 3: Cross multiply
    488,362.80x = 731,913.48 × 393,636.72
  4. Step 4: Simplify right side
    488,362.80x = 288,108,021,590.99
  5. Step 5: Solve for x
    x = 288,108,021,590.99/488,362.80
  6. Step 6: Final answer
    x = 589,946.70

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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.