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Finding the Fourth Proportional to 938.19, 1,404.24 and 526.30

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Solution

The fourth proportional to 938.19, 1,404.24 and 526.30 is: 787.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    938.19 : 1,404.24 = 526.30 : x
  2. Step 2: Convert to fraction form
    938.19/1,404.24 = 526.30/x
  3. Step 3: Cross multiply
    938.19x = 1,404.24 × 526.30
  4. Step 4: Simplify right side
    938.19x = 739,051.51
  5. Step 5: Solve for x
    x = 739,051.51/938.19
  6. Step 6: Final answer
    x = 787.74

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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.