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Finding the Fourth Proportional to 387,315.52, 534,461.40 and 215,222.59

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Solution

The fourth proportional to 387,315.52, 534,461.40 and 215,222.59 is: 296,988.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,315.52 : 534,461.40 = 215,222.59 : x
  2. Step 2: Convert to fraction form
    387,315.52/534,461.40 = 215,222.59/x
  3. Step 3: Cross multiply
    387,315.52x = 534,461.40 × 215,222.59
  4. Step 4: Simplify right side
    387,315.52x = 115,028,166,763.03
  5. Step 5: Solve for x
    x = 115,028,166,763.03/387,315.52
  6. Step 6: Final answer
    x = 296,988.27

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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.