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Finding the Fourth Proportional to 788.83, 1,088.69 and 457.36

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Solution

The fourth proportional to 788.83, 1,088.69 and 457.36 is: 631.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.83 : 1,088.69 = 457.36 : x
  2. Step 2: Convert to fraction form
    788.83/1,088.69 = 457.36/x
  3. Step 3: Cross multiply
    788.83x = 1,088.69 × 457.36
  4. Step 4: Simplify right side
    788.83x = 497,918.25
  5. Step 5: Solve for x
    x = 497,918.25/788.83
  6. Step 6: Final answer
    x = 631.21

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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.