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Finding the Fourth Proportional to 495,981.60, 684,406.62 and 278,198.88

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Solution

The fourth proportional to 495,981.60, 684,406.62 and 278,198.88 is: 383,887.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,981.60 : 684,406.62 = 278,198.88 : x
  2. Step 2: Convert to fraction form
    495,981.60/684,406.62 = 278,198.88/x
  3. Step 3: Cross multiply
    495,981.60x = 684,406.62 × 278,198.88
  4. Step 4: Simplify right side
    495,981.60x = 190,401,155,148.59
  5. Step 5: Solve for x
    x = 190,401,155,148.59/495,981.60
  6. Step 6: Final answer
    x = 383,887.54

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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.