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Finding the Fourth Proportional to 643,325.20, 964,987.80 and 578,006.80

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Solution

The fourth proportional to 643,325.20, 964,987.80 and 578,006.80 is: 867,010.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,325.20 : 964,987.80 = 578,006.80 : x
  2. Step 2: Convert to fraction form
    643,325.20/964,987.80 = 578,006.80/x
  3. Step 3: Cross multiply
    643,325.20x = 964,987.80 × 578,006.80
  4. Step 4: Simplify right side
    643,325.20x = 557,769,510,317.04
  5. Step 5: Solve for x
    x = 557,769,510,317.04/643,325.20
  6. Step 6: Final answer
    x = 867,010.20

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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.