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Finding the Fourth Proportional to 663,820.40, 993,887.40 and 645,388.40

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Solution

The fourth proportional to 663,820.40, 993,887.40 and 645,388.40 is: 966,290.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,820.40 : 993,887.40 = 645,388.40 : x
  2. Step 2: Convert to fraction form
    663,820.40/993,887.40 = 645,388.40/x
  3. Step 3: Cross multiply
    663,820.40x = 993,887.40 × 645,388.40
  4. Step 4: Simplify right side
    663,820.40x = 641,443,398,866.16
  5. Step 5: Solve for x
    x = 641,443,398,866.16/663,820.40
  6. Step 6: Final answer
    x = 966,290.58

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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.