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Finding the Fourth Proportional to 387,079.63, 534,203.57 and 215,031.06

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Solution

The fourth proportional to 387,079.63, 534,203.57 and 215,031.06 is: 296,761.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,079.63 : 534,203.57 = 215,031.06 : x
  2. Step 2: Convert to fraction form
    387,079.63/534,203.57 = 215,031.06/x
  3. Step 3: Cross multiply
    387,079.63x = 534,203.57 × 215,031.06
  4. Step 4: Simplify right side
    387,079.63x = 114,870,360,450.46
  5. Step 5: Solve for x
    x = 114,870,360,450.46/387,079.63
  6. Step 6: Final answer
    x = 296,761.58

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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.