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Finding the Fourth Proportional to 1,374.93, 1,897.46 and 785.65

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Solution

The fourth proportional to 1,374.93, 1,897.46 and 785.65 is: 1,084.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,374.93 : 1,897.46 = 785.65 : x
  2. Step 2: Convert to fraction form
    1,374.93/1,897.46 = 785.65/x
  3. Step 3: Cross multiply
    1,374.93x = 1,897.46 × 785.65
  4. Step 4: Simplify right side
    1,374.93x = 1,490,739.45
  5. Step 5: Solve for x
    x = 1,490,739.45/1,374.93
  6. Step 6: Final answer
    x = 1,084.23

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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.