Home / 709,278.14-978,784.80-386,988.14

Finding the Fourth Proportional to 709,278.14, 978,784.80 and 386,988.14

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Solution

The fourth proportional to 709,278.14, 978,784.80 and 386,988.14 is: 534,033.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,278.14 : 978,784.80 = 386,988.14 : x
  2. Step 2: Convert to fraction form
    709,278.14/978,784.80 = 386,988.14/x
  3. Step 3: Cross multiply
    709,278.14x = 978,784.80 × 386,988.14
  4. Step 4: Simplify right side
    709,278.14x = 378,778,109,212.27
  5. Step 5: Solve for x
    x = 378,778,109,212.27/709,278.14
  6. Step 6: Final answer
    x = 534,033.25

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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.