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Finding the Fourth Proportional to 704,855.30, 972,685.80 and 398,926.22

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Solution

The fourth proportional to 704,855.30, 972,685.80 and 398,926.22 is: 550,509.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,855.30 : 972,685.80 = 398,926.22 : x
  2. Step 2: Convert to fraction form
    704,855.30/972,685.80 = 398,926.22/x
  3. Step 3: Cross multiply
    704,855.30x = 972,685.80 × 398,926.22
  4. Step 4: Simplify right side
    704,855.30x = 388,029,864,578.25
  5. Step 5: Solve for x
    x = 388,029,864,578.25/704,855.30
  6. Step 6: Final answer
    x = 550,509.97

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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.