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Finding the Fourth Proportional to 2,907.66, 4,013.60 and 1,728.72

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Solution

The fourth proportional to 2,907.66, 4,013.60 and 1,728.72 is: 2,386.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,907.66 : 4,013.60 = 1,728.72 : x
  2. Step 2: Convert to fraction form
    2,907.66/4,013.60 = 1,728.72/x
  3. Step 3: Cross multiply
    2,907.66x = 4,013.60 × 1,728.72
  4. Step 4: Simplify right side
    2,907.66x = 6,938,381.95
  5. Step 5: Solve for x
    x = 6,938,381.95/2,907.66
  6. Step 6: Final answer
    x = 2,386.25

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1.5x scale

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.