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Finding the Fourth Proportional to 578,503.14, 866,259.45 and 399,141.60

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Solution

The fourth proportional to 578,503.14, 866,259.45 and 399,141.60 is: 597,680.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,503.14 : 866,259.45 = 399,141.60 : x
  2. Step 2: Convert to fraction form
    578,503.14/866,259.45 = 399,141.60/x
  3. Step 3: Cross multiply
    578,503.14x = 866,259.45 × 399,141.60
  4. Step 4: Simplify right side
    578,503.14x = 345,760,182,888.12
  5. Step 5: Solve for x
    x = 345,760,182,888.12/578,503.14
  6. Step 6: Final answer
    x = 597,680.74

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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.