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Finding the Fourth Proportional to 788.81, 1,088.58 and 434.71

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Solution

The fourth proportional to 788.81, 1,088.58 and 434.71 is: 599.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.81 : 1,088.58 = 434.71 : x
  2. Step 2: Convert to fraction form
    788.81/1,088.58 = 434.71/x
  3. Step 3: Cross multiply
    788.81x = 1,088.58 × 434.71
  4. Step 4: Simplify right side
    788.81x = 473,216.61
  5. Step 5: Solve for x
    x = 473,216.61/788.81
  6. Step 6: Final answer
    x = 599.91

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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.