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Finding the Fourth Proportional to 279,107.65, 385,159.54 and 158,259.70

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Solution

The fourth proportional to 279,107.65, 385,159.54 and 158,259.70 is: 218,393.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,107.65 : 385,159.54 = 158,259.70 : x
  2. Step 2: Convert to fraction form
    279,107.65/385,159.54 = 158,259.70/x
  3. Step 3: Cross multiply
    279,107.65x = 385,159.54 × 158,259.70
  4. Step 4: Simplify right side
    279,107.65x = 60,955,230,931.09
  5. Step 5: Solve for x
    x = 60,955,230,931.09/279,107.65
  6. Step 6: Final answer
    x = 218,393.27

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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.