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Finding the Fourth Proportional to 1,357.95, 1,873.37 and 1,042.65

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Solution

The fourth proportional to 1,357.95, 1,873.37 and 1,042.65 is: 1,438.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,357.95 : 1,873.37 = 1,042.65 : x
  2. Step 2: Convert to fraction form
    1,357.95/1,873.37 = 1,042.65/x
  3. Step 3: Cross multiply
    1,357.95x = 1,873.37 × 1,042.65
  4. Step 4: Simplify right side
    1,357.95x = 1,953,269.23
  5. Step 5: Solve for x
    x = 1,953,269.23/1,357.95
  6. Step 6: Final answer
    x = 1,438.40

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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.