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Finding the Fourth Proportional to 950.87, 1,312.18 and 670.81

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Solution

The fourth proportional to 950.87, 1,312.18 and 670.81 is: 925.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.87 : 1,312.18 = 670.81 : x
  2. Step 2: Convert to fraction form
    950.87/1,312.18 = 670.81/x
  3. Step 3: Cross multiply
    950.87x = 1,312.18 × 670.81
  4. Step 4: Simplify right side
    950.87x = 880,223.47
  5. Step 5: Solve for x
    x = 880,223.47/950.87
  6. Step 6: Final answer
    x = 925.70

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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.