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Finding the Fourth Proportional to 709,447.50, 979,058.19 and 387,178.37

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Solution

The fourth proportional to 709,447.50, 979,058.19 and 387,178.37 is: 534,317.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,447.50 : 979,058.19 = 387,178.37 : x
  2. Step 2: Convert to fraction form
    709,447.50/979,058.19 = 387,178.37/x
  3. Step 3: Cross multiply
    709,447.50x = 979,058.19 × 387,178.37
  4. Step 4: Simplify right side
    709,447.50x = 379,070,149,244.06
  5. Step 5: Solve for x
    x = 379,070,149,244.06/709,447.50
  6. Step 6: Final answer
    x = 534,317.41

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1.5x scale

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.