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Finding the Fourth Proportional to 387,065.76, 534,150.36 and 217,300.20

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Solution

The fourth proportional to 387,065.76, 534,150.36 and 217,300.20 is: 299,874.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,065.76 : 534,150.36 = 217,300.20 : x
  2. Step 2: Convert to fraction form
    387,065.76/534,150.36 = 217,300.20/x
  3. Step 3: Cross multiply
    387,065.76x = 534,150.36 × 217,300.20
  4. Step 4: Simplify right side
    387,065.76x = 116,070,980,058.07
  5. Step 5: Solve for x
    x = 116,070,980,058.07/387,065.76
  6. Step 6: Final answer
    x = 299,874.06

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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.