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Finding the Fourth Proportional to 710,149.50, 979,991.15 and 387,860.90

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Solution

The fourth proportional to 710,149.50, 979,991.15 and 387,860.90 is: 535,239.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,149.50 : 979,991.15 = 387,860.90 : x
  2. Step 2: Convert to fraction form
    710,149.50/979,991.15 = 387,860.90/x
  3. Step 3: Cross multiply
    710,149.50x = 979,991.15 × 387,860.90
  4. Step 4: Simplify right side
    710,149.50x = 380,100,242,591.78
  5. Step 5: Solve for x
    x = 380,100,242,591.78/710,149.50
  6. Step 6: Final answer
    x = 535,239.75

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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.