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Finding the Fourth Proportional to 563,909.28, 778,217.28 and 309,269.76

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Solution

The fourth proportional to 563,909.28, 778,217.28 and 309,269.76 is: 426,804.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    563,909.28 : 778,217.28 = 309,269.76 : x
  2. Step 2: Convert to fraction form
    563,909.28/778,217.28 = 309,269.76/x
  3. Step 3: Cross multiply
    563,909.28x = 778,217.28 × 309,269.76
  4. Step 4: Simplify right side
    563,909.28x = 240,679,071,413.45
  5. Step 5: Solve for x
    x = 240,679,071,413.45/563,909.28
  6. Step 6: Final answer
    x = 426,804.59

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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.