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Finding the Fourth Proportional to 719.15, 1,078.72 and 590.63

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Solution

The fourth proportional to 719.15, 1,078.72 and 590.63 is: 885.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.15 : 1,078.72 = 590.63 : x
  2. Step 2: Convert to fraction form
    719.15/1,078.72 = 590.63/x
  3. Step 3: Cross multiply
    719.15x = 1,078.72 × 590.63
  4. Step 4: Simplify right side
    719.15x = 637,124.39
  5. Step 5: Solve for x
    x = 637,124.39/719.15
  6. Step 6: Final answer
    x = 885.94

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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.