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Finding the Fourth Proportional to 387,401.64, 534,628.02 and 215,323.08

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Solution

The fourth proportional to 387,401.64, 534,628.02 and 215,323.08 is: 297,153.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,401.64 : 534,628.02 = 215,323.08 : x
  2. Step 2: Convert to fraction form
    387,401.64/534,628.02 = 215,323.08/x
  3. Step 3: Cross multiply
    387,401.64x = 534,628.02 × 215,323.08
  4. Step 4: Simplify right side
    387,401.64x = 115,117,751,920.70
  5. Step 5: Solve for x
    x = 115,117,751,920.70/387,401.64
  6. Step 6: Final answer
    x = 297,153.50

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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.