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Finding the Fourth Proportional to 1,277.40, 1,915.50 and 497.76

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Solution

The fourth proportional to 1,277.40, 1,915.50 and 497.76 is: 746.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.40 : 1,915.50 = 497.76 : x
  2. Step 2: Convert to fraction form
    1,277.40/1,915.50 = 497.76/x
  3. Step 3: Cross multiply
    1,277.40x = 1,915.50 × 497.76
  4. Step 4: Simplify right side
    1,277.40x = 953,459.28
  5. Step 5: Solve for x
    x = 953,459.28/1,277.40
  6. Step 6: Final answer
    x = 746.41

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Double scale
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1.5x scale

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.