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Finding the Fourth Proportional to 387,329.64, 534,564.96 and 217,563.80

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Solution

The fourth proportional to 387,329.64, 534,564.96 and 217,563.80 is: 300,266.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,329.64 : 534,564.96 = 217,563.80 : x
  2. Step 2: Convert to fraction form
    387,329.64/534,564.96 = 217,563.80/x
  3. Step 3: Cross multiply
    387,329.64x = 534,564.96 × 217,563.80
  4. Step 4: Simplify right side
    387,329.64x = 116,301,984,044.45
  5. Step 5: Solve for x
    x = 116,301,984,044.45/387,329.64
  6. Step 6: Final answer
    x = 300,266.16

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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.