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Finding the Fourth Proportional to 387,605.20, 534,900.36 and 217,829.20

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Solution

The fourth proportional to 387,605.20, 534,900.36 and 217,829.20 is: 300,607.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,605.20 : 534,900.36 = 217,829.20 : x
  2. Step 2: Convert to fraction form
    387,605.20/534,900.36 = 217,829.20/x
  3. Step 3: Cross multiply
    387,605.20x = 534,900.36 × 217,829.20
  4. Step 4: Simplify right side
    387,605.20x = 116,516,917,498.51
  5. Step 5: Solve for x
    x = 116,516,917,498.51/387,605.20
  6. Step 6: Final answer
    x = 300,607.21

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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.