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Finding the Fourth Proportional to 784.89, 1,083.50 and 575.07

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Solution

The fourth proportional to 784.89, 1,083.50 and 575.07 is: 793.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    784.89 : 1,083.50 = 575.07 : x
  2. Step 2: Convert to fraction form
    784.89/1,083.50 = 575.07/x
  3. Step 3: Cross multiply
    784.89x = 1,083.50 × 575.07
  4. Step 4: Simplify right side
    784.89x = 623,094.32
  5. Step 5: Solve for x
    x = 623,094.32/784.89
  6. Step 6: Final answer
    x = 793.86

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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.