Home / 782,178.69-1,079,421.92-510,420.45

Finding the Fourth Proportional to 782,178.69, 1,079,421.92 and 510,420.45

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Solution

The fourth proportional to 782,178.69, 1,079,421.92 and 510,420.45 is: 704,390.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    782,178.69 : 1,079,421.92 = 510,420.45 : x
  2. Step 2: Convert to fraction form
    782,178.69/1,079,421.92 = 510,420.45/x
  3. Step 3: Cross multiply
    782,178.69x = 1,079,421.92 × 510,420.45
  4. Step 4: Simplify right side
    782,178.69x = 550,959,019,594.16
  5. Step 5: Solve for x
    x = 550,959,019,594.16/782,178.69
  6. Step 6: Final answer
    x = 704,390.22

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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.