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Finding the Fourth Proportional to 1,377.47, 2,066.28 and 555.64

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Solution

The fourth proportional to 1,377.47, 2,066.28 and 555.64 is: 833.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,377.47 : 2,066.28 = 555.64 : x
  2. Step 2: Convert to fraction form
    1,377.47/2,066.28 = 555.64/x
  3. Step 3: Cross multiply
    1,377.47x = 2,066.28 × 555.64
  4. Step 4: Simplify right side
    1,377.47x = 1,148,112.19
  5. Step 5: Solve for x
    x = 1,148,112.19/1,377.47
  6. Step 6: Final answer
    x = 833.49

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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.