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Finding the Fourth Proportional to 1,345.99, 2,017.14 and 858.17

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Solution

The fourth proportional to 1,345.99, 2,017.14 and 858.17 is: 1,286.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345.99 : 2,017.14 = 858.17 : x
  2. Step 2: Convert to fraction form
    1,345.99/2,017.14 = 858.17/x
  3. Step 3: Cross multiply
    1,345.99x = 2,017.14 × 858.17
  4. Step 4: Simplify right side
    1,345.99x = 1,731,038.95
  5. Step 5: Solve for x
    x = 1,731,038.95/1,345.99
  6. Step 6: Final answer
    x = 1,286.07

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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.