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Finding the Fourth Proportional to 788.90, 1,088.75 and 434.90

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Solution

The fourth proportional to 788.90, 1,088.75 and 434.90 is: 600.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.90 : 1,088.75 = 434.90 : x
  2. Step 2: Convert to fraction form
    788.90/1,088.75 = 434.90/x
  3. Step 3: Cross multiply
    788.90x = 1,088.75 × 434.90
  4. Step 4: Simplify right side
    788.90x = 473,493.02
  5. Step 5: Solve for x
    x = 473,493.02/788.90
  6. Step 6: Final answer
    x = 600.19

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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.