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Finding the Fourth Proportional to 463,951.79, 640,070.80 and 289,420.43

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Solution

The fourth proportional to 463,951.79, 640,070.80 and 289,420.43 is: 399,286.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    463,951.79 : 640,070.80 = 289,420.43 : x
  2. Step 2: Convert to fraction form
    463,951.79/640,070.80 = 289,420.43/x
  3. Step 3: Cross multiply
    463,951.79x = 640,070.80 × 289,420.43
  4. Step 4: Simplify right side
    463,951.79x = 185,249,566,166.44
  5. Step 5: Solve for x
    x = 185,249,566,166.44/463,951.79
  6. Step 6: Final answer
    x = 399,286.24

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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.