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Finding the Fourth Proportional to 715,365.70, 987,290.49 and 429,043.30

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Solution

The fourth proportional to 715,365.70, 987,290.49 and 429,043.30 is: 592,131.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,365.70 : 987,290.49 = 429,043.30 : x
  2. Step 2: Convert to fraction form
    715,365.70/987,290.49 = 429,043.30/x
  3. Step 3: Cross multiply
    715,365.70x = 987,290.49 × 429,043.30
  4. Step 4: Simplify right side
    715,365.70x = 423,590,369,888.22
  5. Step 5: Solve for x
    x = 423,590,369,888.22/715,365.70
  6. Step 6: Final answer
    x = 592,131.23

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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.