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Finding the Fourth Proportional to 1,283.68, 1,925.60 and 417.76

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Solution

The fourth proportional to 1,283.68, 1,925.60 and 417.76 is: 626.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283.68 : 1,925.60 = 417.76 : x
  2. Step 2: Convert to fraction form
    1,283.68/1,925.60 = 417.76/x
  3. Step 3: Cross multiply
    1,283.68x = 1,925.60 × 417.76
  4. Step 4: Simplify right side
    1,283.68x = 804,438.66
  5. Step 5: Solve for x
    x = 804,438.66/1,283.68
  6. Step 6: Final answer
    x = 626.67

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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.