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Finding the Fourth Proportional to 709,980.48, 979,774.72 and 387,693.12

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Solution

The fourth proportional to 709,980.48, 979,774.72 and 387,693.12 is: 535,017.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,980.48 : 979,774.72 = 387,693.12 : x
  2. Step 2: Convert to fraction form
    709,980.48/979,774.72 = 387,693.12/x
  3. Step 3: Cross multiply
    709,980.48x = 979,774.72 × 387,693.12
  4. Step 4: Simplify right side
    709,980.48x = 379,851,918,093.93
  5. Step 5: Solve for x
    x = 379,851,918,093.93/709,980.48
  6. Step 6: Final answer
    x = 535,017.41

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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.