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Finding the Fourth Proportional to 4,915.51, 7,335.51 and 4,390.02

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Solution

The fourth proportional to 4,915.51, 7,335.51 and 4,390.02 is: 6,551.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,915.51 : 7,335.51 = 4,390.02 : x
  2. Step 2: Convert to fraction form
    4,915.51/7,335.51 = 4,390.02/x
  3. Step 3: Cross multiply
    4,915.51x = 7,335.51 × 4,390.02
  4. Step 4: Simplify right side
    4,915.51x = 32,203,043.84
  5. Step 5: Solve for x
    x = 32,203,043.84/4,915.51
  6. Step 6: Final answer
    x = 6,551.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.