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Finding the Fourth Proportional to 279,699, 385,971.12 and 158,824.32

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Solution

The fourth proportional to 279,699, 385,971.12 and 158,824.32 is: 219,169.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,699 : 385,971.12 = 158,824.32 : x
  2. Step 2: Convert to fraction form
    279,699/385,971.12 = 158,824.32/x
  3. Step 3: Cross multiply
    279,699x = 385,971.12 × 158,824.32
  4. Step 4: Simplify right side
    279,699x = 61,301,600,673.64
  5. Step 5: Solve for x
    x = 61,301,600,673.64/279,699
  6. Step 6: Final answer
    x = 219,169.90

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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.