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Finding the Fourth Proportional to 873.60, 1,308 and 488.16

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Solution

The fourth proportional to 873.60, 1,308 and 488.16 is: 730.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.60 : 1,308 = 488.16 : x
  2. Step 2: Convert to fraction form
    873.60/1,308 = 488.16/x
  3. Step 3: Cross multiply
    873.60x = 1,308 × 488.16
  4. Step 4: Simplify right side
    873.60x = 638,513.28
  5. Step 5: Solve for x
    x = 638,513.28/873.60
  6. Step 6: Final answer
    x = 730.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.