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Finding the Fourth Proportional to 777,726.30, 1,073,262.05 and 420,030.30

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Solution

The fourth proportional to 777,726.30, 1,073,262.05 and 420,030.30 is: 579,641.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    777,726.30 : 1,073,262.05 = 420,030.30 : x
  2. Step 2: Convert to fraction form
    777,726.30/1,073,262.05 = 420,030.30/x
  3. Step 3: Cross multiply
    777,726.30x = 1,073,262.05 × 420,030.30
  4. Step 4: Simplify right side
    777,726.30x = 450,802,580,840.12
  5. Step 5: Solve for x
    x = 450,802,580,840.12/777,726.30
  6. Step 6: Final answer
    x = 579,641.68

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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.