Home / 829,400.80-1,243,117.05-429,835.90

Finding the Fourth Proportional to 829,400.80, 1,243,117.05 and 429,835.90

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Solution

The fourth proportional to 829,400.80, 1,243,117.05 and 429,835.90 is: 644,243.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    829,400.80 : 1,243,117.05 = 429,835.90 : x
  2. Step 2: Convert to fraction form
    829,400.80/1,243,117.05 = 429,835.90/x
  3. Step 3: Cross multiply
    829,400.80x = 1,243,117.05 × 429,835.90
  4. Step 4: Simplify right side
    829,400.80x = 534,336,335,992.10
  5. Step 5: Solve for x
    x = 534,336,335,992.10/829,400.80
  6. Step 6: Final answer
    x = 644,243.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.