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Finding the Fourth Proportional to 1,345.17, 1,856.25 and 814.17

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Solution

The fourth proportional to 1,345.17, 1,856.25 and 814.17 is: 1,123.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345.17 : 1,856.25 = 814.17 : x
  2. Step 2: Convert to fraction form
    1,345.17/1,856.25 = 814.17/x
  3. Step 3: Cross multiply
    1,345.17x = 1,856.25 × 814.17
  4. Step 4: Simplify right side
    1,345.17x = 1,511,303.06
  5. Step 5: Solve for x
    x = 1,511,303.06/1,345.17
  6. Step 6: Final answer
    x = 1,123.50

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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.