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Finding the Fourth Proportional to 2,975.90, 4,463.76 and 784.64

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Solution

The fourth proportional to 2,975.90, 4,463.76 and 784.64 is: 1,176.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,975.90 : 4,463.76 = 784.64 : x
  2. Step 2: Convert to fraction form
    2,975.90/4,463.76 = 784.64/x
  3. Step 3: Cross multiply
    2,975.90x = 4,463.76 × 784.64
  4. Step 4: Simplify right side
    2,975.90x = 3,502,444.65
  5. Step 5: Solve for x
    x = 3,502,444.65/2,975.90
  6. Step 6: Final answer
    x = 1,176.94

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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.