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Finding the Fourth Proportional to 1,564.40, 2,347.21 and 833.58

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Solution

The fourth proportional to 1,564.40, 2,347.21 and 833.58 is: 1,250.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,564.40 : 2,347.21 = 833.58 : x
  2. Step 2: Convert to fraction form
    1,564.40/2,347.21 = 833.58/x
  3. Step 3: Cross multiply
    1,564.40x = 2,347.21 × 833.58
  4. Step 4: Simplify right side
    1,564.40x = 1,956,587.31
  5. Step 5: Solve for x
    x = 1,956,587.31/1,564.40
  6. Step 6: Final answer
    x = 1,250.70

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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.