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Finding the Fourth Proportional to 1,506.48, 2,078.71 and 917.21

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Solution

The fourth proportional to 1,506.48, 2,078.71 and 917.21 is: 1,265.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,506.48 : 2,078.71 = 917.21 : x
  2. Step 2: Convert to fraction form
    1,506.48/2,078.71 = 917.21/x
  3. Step 3: Cross multiply
    1,506.48x = 2,078.71 × 917.21
  4. Step 4: Simplify right side
    1,506.48x = 1,906,598.62
  5. Step 5: Solve for x
    x = 1,906,598.62/1,506.48
  6. Step 6: Final answer
    x = 1,265.60

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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.