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Finding the Fourth Proportional to 950.64, 1,312.32 and 619.56

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Solution

The fourth proportional to 950.64, 1,312.32 and 619.56 is: 855.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.64 : 1,312.32 = 619.56 : x
  2. Step 2: Convert to fraction form
    950.64/1,312.32 = 619.56/x
  3. Step 3: Cross multiply
    950.64x = 1,312.32 × 619.56
  4. Step 4: Simplify right side
    950.64x = 813,060.98
  5. Step 5: Solve for x
    x = 813,060.98/950.64
  6. Step 6: Final answer
    x = 855.28

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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.