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Finding the Fourth Proportional to 957.51, 1,319.86 and 677.15

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Solution

The fourth proportional to 957.51, 1,319.86 and 677.15 is: 933.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.51 : 1,319.86 = 677.15 : x
  2. Step 2: Convert to fraction form
    957.51/1,319.86 = 677.15/x
  3. Step 3: Cross multiply
    957.51x = 1,319.86 × 677.15
  4. Step 4: Simplify right side
    957.51x = 893,743.20
  5. Step 5: Solve for x
    x = 893,743.20/957.51
  6. Step 6: Final answer
    x = 933.40

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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.