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Finding the Fourth Proportional to 893,537.80, 1,340,306.70 and 388,340.80

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Solution

The fourth proportional to 893,537.80, 1,340,306.70 and 388,340.80 is: 582,511.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    893,537.80 : 1,340,306.70 = 388,340.80 : x
  2. Step 2: Convert to fraction form
    893,537.80/1,340,306.70 = 388,340.80/x
  3. Step 3: Cross multiply
    893,537.80x = 1,340,306.70 × 388,340.80
  4. Step 4: Simplify right side
    893,537.80x = 520,495,776,123.36
  5. Step 5: Solve for x
    x = 520,495,776,123.36/893,537.80
  6. Step 6: Final answer
    x = 582,511.20

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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.