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Finding the Fourth Proportional to 662,355.20, 993,970.20 and 378,045.20

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Solution

The fourth proportional to 662,355.20, 993,970.20 and 378,045.20 is: 567,317.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,355.20 : 993,970.20 = 378,045.20 : x
  2. Step 2: Convert to fraction form
    662,355.20/993,970.20 = 378,045.20/x
  3. Step 3: Cross multiply
    662,355.20x = 993,970.20 × 378,045.20
  4. Step 4: Simplify right side
    662,355.20x = 375,765,663,053.04
  5. Step 5: Solve for x
    x = 375,765,663,053.04/662,355.20
  6. Step 6: Final answer
    x = 567,317.45

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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.