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Finding the Fourth Proportional to 1,758.47, 2,637.91 and 784.45

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Solution

The fourth proportional to 1,758.47, 2,637.91 and 784.45 is: 1,176.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,758.47 : 2,637.91 = 784.45 : x
  2. Step 2: Convert to fraction form
    1,758.47/2,637.91 = 784.45/x
  3. Step 3: Cross multiply
    1,758.47x = 2,637.91 × 784.45
  4. Step 4: Simplify right side
    1,758.47x = 2,069,308.50
  5. Step 5: Solve for x
    x = 2,069,308.50/1,758.47
  6. Step 6: Final answer
    x = 1,176.77

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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.