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Finding the Fourth Proportional to 342,979.64, 513,547.86 and 279,539.72

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Solution

The fourth proportional to 342,979.64, 513,547.86 and 279,539.72 is: 418,558.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,979.64 : 513,547.86 = 279,539.72 : x
  2. Step 2: Convert to fraction form
    342,979.64/513,547.86 = 279,539.72/x
  3. Step 3: Cross multiply
    342,979.64x = 513,547.86 × 279,539.72
  4. Step 4: Simplify right side
    342,979.64x = 143,557,024,991.00
  5. Step 5: Solve for x
    x = 143,557,024,991.00/342,979.64
  6. Step 6: Final answer
    x = 418,558.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.