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Finding the Fourth Proportional to 708,803.33, 978,172.22 and 386,531.06

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Solution

The fourth proportional to 708,803.33, 978,172.22 and 386,531.06 is: 533,425.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,803.33 : 978,172.22 = 386,531.06 : x
  2. Step 2: Convert to fraction form
    708,803.33/978,172.22 = 386,531.06/x
  3. Step 3: Cross multiply
    708,803.33x = 978,172.22 × 386,531.06
  4. Step 4: Simplify right side
    708,803.33x = 378,093,943,126.50
  5. Step 5: Solve for x
    x = 378,093,943,126.50/708,803.33
  6. Step 6: Final answer
    x = 533,425.74

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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.