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Finding the Fourth Proportional to 1,432,934.45, 1,977,449.45 and 788,340.80

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Solution

The fourth proportional to 1,432,934.45, 1,977,449.45 and 788,340.80 is: 1,087,910.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432,934.45 : 1,977,449.45 = 788,340.80 : x
  2. Step 2: Convert to fraction form
    1,432,934.45/1,977,449.45 = 788,340.80/x
  3. Step 3: Cross multiply
    1,432,934.45x = 1,977,449.45 × 788,340.80
  4. Step 4: Simplify right side
    1,432,934.45x = 1,558,904,081,372.56
  5. Step 5: Solve for x
    x = 1,558,904,081,372.56/1,432,934.45
  6. Step 6: Final answer
    x = 1,087,910.25

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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.