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Finding the Fourth Proportional to 715.05, 988.05 and 558.08

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Solution

The fourth proportional to 715.05, 988.05 and 558.08 is: 771.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.05 : 988.05 = 558.08 : x
  2. Step 2: Convert to fraction form
    715.05/988.05 = 558.08/x
  3. Step 3: Cross multiply
    715.05x = 988.05 × 558.08
  4. Step 4: Simplify right side
    715.05x = 551,406.00
  5. Step 5: Solve for x
    x = 551,406.00/715.05
  6. Step 6: Final answer
    x = 771.14

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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.