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Finding the Fourth Proportional to 788.10, 1,087.38 and 473.46

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Solution

The fourth proportional to 788.10, 1,087.38 and 473.46 is: 653.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.10 : 1,087.38 = 473.46 : x
  2. Step 2: Convert to fraction form
    788.10/1,087.38 = 473.46/x
  3. Step 3: Cross multiply
    788.10x = 1,087.38 × 473.46
  4. Step 4: Simplify right side
    788.10x = 514,830.93
  5. Step 5: Solve for x
    x = 514,830.93/788.10
  6. Step 6: Final answer
    x = 653.26

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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.