Home / 1,938.14-2,907.18-477.30

Finding the Fourth Proportional to 1,938.14, 2,907.18 and 477.30

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Solution

The fourth proportional to 1,938.14, 2,907.18 and 477.30 is: 715.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.14 : 2,907.18 = 477.30 : x
  2. Step 2: Convert to fraction form
    1,938.14/2,907.18 = 477.30/x
  3. Step 3: Cross multiply
    1,938.14x = 2,907.18 × 477.30
  4. Step 4: Simplify right side
    1,938.14x = 1,387,597.01
  5. Step 5: Solve for x
    x = 1,387,597.01/1,938.14
  6. Step 6: Final answer
    x = 715.94

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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.