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Finding the Fourth Proportional to 279,720.97, 386,014.98 and 152,396.56

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Solution

The fourth proportional to 279,720.97, 386,014.98 and 152,396.56 is: 210,307.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,720.97 : 386,014.98 = 152,396.56 : x
  2. Step 2: Convert to fraction form
    279,720.97/386,014.98 = 152,396.56/x
  3. Step 3: Cross multiply
    279,720.97x = 386,014.98 × 152,396.56
  4. Step 4: Simplify right side
    279,720.97x = 58,827,355,060.47
  5. Step 5: Solve for x
    x = 58,827,355,060.47/279,720.97
  6. Step 6: Final answer
    x = 210,307.28

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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.