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Finding the Fourth Proportional to 629,287.90, 868,412.80 and 342,807.91

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Solution

The fourth proportional to 629,287.90, 868,412.80 and 342,807.91 is: 473,072.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,287.90 : 868,412.80 = 342,807.91 : x
  2. Step 2: Convert to fraction form
    629,287.90/868,412.80 = 342,807.91/x
  3. Step 3: Cross multiply
    629,287.90x = 868,412.80 × 342,807.91
  4. Step 4: Simplify right side
    629,287.90x = 297,698,776,985.25
  5. Step 5: Solve for x
    x = 297,698,776,985.25/629,287.90
  6. Step 6: Final answer
    x = 473,072.46

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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.