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Finding the Fourth Proportional to 387,317.71, 534,486.81 and 215,235.10

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Solution

The fourth proportional to 387,317.71, 534,486.81 and 215,235.10 is: 297,017.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,317.71 : 534,486.81 = 215,235.10 : x
  2. Step 2: Convert to fraction form
    387,317.71/534,486.81 = 215,235.10/x
  3. Step 3: Cross multiply
    387,317.71x = 534,486.81 × 215,235.10
  4. Step 4: Simplify right side
    387,317.71x = 115,040,321,999.03
  5. Step 5: Solve for x
    x = 115,040,321,999.03/387,317.71
  6. Step 6: Final answer
    x = 297,017.98

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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.