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Finding the Fourth Proportional to 666.16, 918.20 and 526.03

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Solution

The fourth proportional to 666.16, 918.20 and 526.03 is: 725.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.16 : 918.20 = 526.03 : x
  2. Step 2: Convert to fraction form
    666.16/918.20 = 526.03/x
  3. Step 3: Cross multiply
    666.16x = 918.20 × 526.03
  4. Step 4: Simplify right side
    666.16x = 482,999.77
  5. Step 5: Solve for x
    x = 482,999.77/666.16
  6. Step 6: Final answer
    x = 725.05

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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.