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Finding the Fourth Proportional to 486,102.72, 670,721.55 and 279,331.14

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Solution

The fourth proportional to 486,102.72, 670,721.55 and 279,331.14 is: 385,419.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,102.72 : 670,721.55 = 279,331.14 : x
  2. Step 2: Convert to fraction form
    486,102.72/670,721.55 = 279,331.14/x
  3. Step 3: Cross multiply
    486,102.72x = 670,721.55 × 279,331.14
  4. Step 4: Simplify right side
    486,102.72x = 187,353,415,184.07
  5. Step 5: Solve for x
    x = 187,353,415,184.07/486,102.72
  6. Step 6: Final answer
    x = 385,419.39

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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.