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Finding the Fourth Proportional to 387,701.88, 535,031.52 and 215,622.24

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Solution

The fourth proportional to 387,701.88, 535,031.52 and 215,622.24 is: 297,560.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,701.88 : 535,031.52 = 215,622.24 : x
  2. Step 2: Convert to fraction form
    387,701.88/535,031.52 = 215,622.24/x
  3. Step 3: Cross multiply
    387,701.88x = 535,031.52 × 215,622.24
  4. Step 4: Simplify right side
    387,701.88x = 115,364,694,813.01
  5. Step 5: Solve for x
    x = 115,364,694,813.01/387,701.88
  6. Step 6: Final answer
    x = 297,560.32

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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.