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Finding the Fourth Proportional to 699.46, 1,053.93 and 580.39

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Solution

The fourth proportional to 699.46, 1,053.93 and 580.39 is: 874.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.46 : 1,053.93 = 580.39 : x
  2. Step 2: Convert to fraction form
    699.46/1,053.93 = 580.39/x
  3. Step 3: Cross multiply
    699.46x = 1,053.93 × 580.39
  4. Step 4: Simplify right side
    699.46x = 611,688.98
  5. Step 5: Solve for x
    x = 611,688.98/699.46
  6. Step 6: Final answer
    x = 874.52

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.