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Finding the Fourth Proportional to 279,720.91, 386,014.90 and 152,396.50

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Solution

The fourth proportional to 279,720.91, 386,014.90 and 152,396.50 is: 210,307.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,720.91 : 386,014.90 = 152,396.50 : x
  2. Step 2: Convert to fraction form
    279,720.91/386,014.90 = 152,396.50/x
  3. Step 3: Cross multiply
    279,720.91x = 386,014.90 × 152,396.50
  4. Step 4: Simplify right side
    279,720.91x = 58,827,319,707.85
  5. Step 5: Solve for x
    x = 58,827,319,707.85/279,720.91
  6. Step 6: Final answer
    x = 210,307.19

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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.