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Finding the Fourth Proportional to 279,319.61, 385,458.62 and 151,995.31

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Solution

The fourth proportional to 279,319.61, 385,458.62 and 151,995.31 is: 209,752.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,319.61 : 385,458.62 = 151,995.31 : x
  2. Step 2: Convert to fraction form
    279,319.61/385,458.62 = 151,995.31/x
  3. Step 3: Cross multiply
    279,319.61x = 385,458.62 × 151,995.31
  4. Step 4: Simplify right side
    279,319.61x = 58,587,900,715.45
  5. Step 5: Solve for x
    x = 58,587,900,715.45/279,319.61
  6. Step 6: Final answer
    x = 209,752.19

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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.