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Finding the Fourth Proportional to 751.54, 1,038.45 and 578.38

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Solution

The fourth proportional to 751.54, 1,038.45 and 578.38 is: 799.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.54 : 1,038.45 = 578.38 : x
  2. Step 2: Convert to fraction form
    751.54/1,038.45 = 578.38/x
  3. Step 3: Cross multiply
    751.54x = 1,038.45 × 578.38
  4. Step 4: Simplify right side
    751.54x = 600,618.71
  5. Step 5: Solve for x
    x = 600,618.71/751.54
  6. Step 6: Final answer
    x = 799.18

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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.