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Finding the Fourth Proportional to 715,365.20, 987,289.80 and 429,042.80

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Solution

The fourth proportional to 715,365.20, 987,289.80 and 429,042.80 is: 592,130.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,365.20 : 987,289.80 = 429,042.80 : x
  2. Step 2: Convert to fraction form
    715,365.20/987,289.80 = 429,042.80/x
  3. Step 3: Cross multiply
    715,365.20x = 987,289.80 × 429,042.80
  4. Step 4: Simplify right side
    715,365.20x = 423,589,580,203.44
  5. Step 5: Solve for x
    x = 423,589,580,203.44/715,365.20
  6. Step 6: Final answer
    x = 592,130.54

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1.5x scale

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.