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Finding the Fourth Proportional to 387,297.16, 534,459.42 and 215,210.68

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Solution

The fourth proportional to 387,297.16, 534,459.42 and 215,210.68 is: 296,984.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,297.16 : 534,459.42 = 215,210.68 : x
  2. Step 2: Convert to fraction form
    387,297.16/534,459.42 = 215,210.68/x
  3. Step 3: Cross multiply
    387,297.16x = 534,459.42 × 215,210.68
  4. Step 4: Simplify right side
    387,297.16x = 115,021,375,210.61
  5. Step 5: Solve for x
    x = 115,021,375,210.61/387,297.16
  6. Step 6: Final answer
    x = 296,984.81

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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.