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Finding the Fourth Proportional to 709,222.95, 978,726.29 and 386,933.27

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Solution

The fourth proportional to 709,222.95, 978,726.29 and 386,933.27 is: 533,967.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,222.95 : 978,726.29 = 386,933.27 : x
  2. Step 2: Convert to fraction form
    709,222.95/978,726.29 = 386,933.27/x
  3. Step 3: Cross multiply
    709,222.95x = 978,726.29 × 386,933.27
  4. Step 4: Simplify right side
    709,222.95x = 378,701,756,996.37
  5. Step 5: Solve for x
    x = 378,701,756,996.37/709,222.95
  6. Step 6: Final answer
    x = 533,967.15

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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.