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Finding the Fourth Proportional to 1,547.94, 2,321.92 and 521.94

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Solution

The fourth proportional to 1,547.94, 2,321.92 and 521.94 is: 782.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,547.94 : 2,321.92 = 521.94 : x
  2. Step 2: Convert to fraction form
    1,547.94/2,321.92 = 521.94/x
  3. Step 3: Cross multiply
    1,547.94x = 2,321.92 × 521.94
  4. Step 4: Simplify right side
    1,547.94x = 1,211,902.92
  5. Step 5: Solve for x
    x = 1,211,902.92/1,547.94
  6. Step 6: Final answer
    x = 782.91

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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.