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Finding the Fourth Proportional to 743.94, 1,025.40 and 627.08

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Solution

The fourth proportional to 743.94, 1,025.40 and 627.08 is: 864.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.94 : 1,025.40 = 627.08 : x
  2. Step 2: Convert to fraction form
    743.94/1,025.40 = 627.08/x
  3. Step 3: Cross multiply
    743.94x = 1,025.40 × 627.08
  4. Step 4: Simplify right side
    743.94x = 643,002.71
  5. Step 5: Solve for x
    x = 643,002.71/743.94
  6. Step 6: Final answer
    x = 864.32

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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.