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Finding the Fourth Proportional to 279,451.50, 385,643.07 and 152,119.50

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Solution

The fourth proportional to 279,451.50, 385,643.07 and 152,119.50 is: 209,924.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,451.50 : 385,643.07 = 152,119.50 : x
  2. Step 2: Convert to fraction form
    279,451.50/385,643.07 = 152,119.50/x
  3. Step 3: Cross multiply
    279,451.50x = 385,643.07 × 152,119.50
  4. Step 4: Simplify right side
    279,451.50x = 58,663,830,986.87
  5. Step 5: Solve for x
    x = 58,663,830,986.87/279,451.50
  6. Step 6: Final answer
    x = 209,924.91

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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.