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Finding the Fourth Proportional to 626,877.64, 865,068.78 and 340,391.80

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Solution

The fourth proportional to 626,877.64, 865,068.78 and 340,391.80 is: 469,728.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,877.64 : 865,068.78 = 340,391.80 : x
  2. Step 2: Convert to fraction form
    626,877.64/865,068.78 = 340,391.80/x
  3. Step 3: Cross multiply
    626,877.64x = 865,068.78 × 340,391.80
  4. Step 4: Simplify right side
    626,877.64x = 294,462,319,148.00
  5. Step 5: Solve for x
    x = 294,462,319,148.00/626,877.64
  6. Step 6: Final answer
    x = 469,728.54

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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.