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Finding the Fourth Proportional to 279,307, 385,440.42 and 151,980.40

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Solution

The fourth proportional to 279,307, 385,440.42 and 151,980.40 is: 209,731.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,307 : 385,440.42 = 151,980.40 : x
  2. Step 2: Convert to fraction form
    279,307/385,440.42 = 151,980.40/x
  3. Step 3: Cross multiply
    279,307x = 385,440.42 × 151,980.40
  4. Step 4: Simplify right side
    279,307x = 58,579,389,207.77
  5. Step 5: Solve for x
    x = 58,579,389,207.77/279,307
  6. Step 6: Final answer
    x = 209,731.19

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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.