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Finding the Fourth Proportional to 355,062.80, 531,816.60 and 315,664.40

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Solution

The fourth proportional to 355,062.80, 531,816.60 and 315,664.40 is: 472,805.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,062.80 : 531,816.60 = 315,664.40 : x
  2. Step 2: Convert to fraction form
    355,062.80/531,816.60 = 315,664.40/x
  3. Step 3: Cross multiply
    355,062.80x = 531,816.60 × 315,664.40
  4. Step 4: Simplify right side
    355,062.80x = 167,875,567,949.04
  5. Step 5: Solve for x
    x = 167,875,567,949.04/355,062.80
  6. Step 6: Final answer
    x = 472,805.28

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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.