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Finding the Fourth Proportional to 1,277.02, 1,915.72 and 1,207

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Solution

The fourth proportional to 1,277.02, 1,915.72 and 1,207 is: 1,810.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.02 : 1,915.72 = 1,207 : x
  2. Step 2: Convert to fraction form
    1,277.02/1,915.72 = 1,207/x
  3. Step 3: Cross multiply
    1,277.02x = 1,915.72 × 1,207
  4. Step 4: Simplify right side
    1,277.02x = 2,312,274.04
  5. Step 5: Solve for x
    x = 2,312,274.04/1,277.02
  6. Step 6: Final answer
    x = 1,810.68

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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.