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Finding the Fourth Proportional to 1,374.79, 1,897.37 and 807.84

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Solution

The fourth proportional to 1,374.79, 1,897.37 and 807.84 is: 1,114.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,374.79 : 1,897.37 = 807.84 : x
  2. Step 2: Convert to fraction form
    1,374.79/1,897.37 = 807.84/x
  3. Step 3: Cross multiply
    1,374.79x = 1,897.37 × 807.84
  4. Step 4: Simplify right side
    1,374.79x = 1,532,771.38
  5. Step 5: Solve for x
    x = 1,532,771.38/1,374.79
  6. Step 6: Final answer
    x = 1,114.91

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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.