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Finding the Fourth Proportional to 626,878.64, 865,070.16 and 340,392.80

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Solution

The fourth proportional to 626,878.64, 865,070.16 and 340,392.80 is: 469,729.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,878.64 : 865,070.16 = 340,392.80 : x
  2. Step 2: Convert to fraction form
    626,878.64/865,070.16 = 340,392.80/x
  3. Step 3: Cross multiply
    626,878.64x = 865,070.16 × 340,392.80
  4. Step 4: Simplify right side
    626,878.64x = 294,463,653,958.85
  5. Step 5: Solve for x
    x = 294,463,653,958.85/626,878.64
  6. Step 6: Final answer
    x = 469,729.92

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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.