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Finding the Fourth Proportional to 1,316.78, 1,973.80 and 622.92

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Solution

The fourth proportional to 1,316.78, 1,973.80 and 622.92 is: 933.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.78 : 1,973.80 = 622.92 : x
  2. Step 2: Convert to fraction form
    1,316.78/1,973.80 = 622.92/x
  3. Step 3: Cross multiply
    1,316.78x = 1,973.80 × 622.92
  4. Step 4: Simplify right side
    1,316.78x = 1,229,507.74
  5. Step 5: Solve for x
    x = 1,229,507.74/1,316.78
  6. Step 6: Final answer
    x = 933.73

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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.