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Finding the Fourth Proportional to 387,523.01, 534,751.47 and 215,430.51

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Solution

The fourth proportional to 387,523.01, 534,751.47 and 215,430.51 is: 297,277.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,523.01 : 534,751.47 = 215,430.51 : x
  2. Step 2: Convert to fraction form
    387,523.01/534,751.47 = 215,430.51/x
  3. Step 3: Cross multiply
    387,523.01x = 534,751.47 × 215,430.51
  4. Step 4: Simplify right side
    387,523.01x = 115,201,781,905.35
  5. Step 5: Solve for x
    x = 115,201,781,905.35/387,523.01
  6. Step 6: Final answer
    x = 297,277.27

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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.