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Finding the Fourth Proportional to 279,282.75, 385,398.85 and 158,421.45

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Solution

The fourth proportional to 279,282.75, 385,398.85 and 158,421.45 is: 218,615.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,282.75 : 385,398.85 = 158,421.45 : x
  2. Step 2: Convert to fraction form
    279,282.75/385,398.85 = 158,421.45/x
  3. Step 3: Cross multiply
    279,282.75x = 385,398.85 × 158,421.45
  4. Step 4: Simplify right side
    279,282.75x = 61,055,443,448.41
  5. Step 5: Solve for x
    x = 61,055,443,448.41/279,282.75
  6. Step 6: Final answer
    x = 218,615.16

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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.