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Finding the Fourth Proportional to 576,128.34, 864,208.31 and 155,403

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Solution

The fourth proportional to 576,128.34, 864,208.31 and 155,403 is: 233,108.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,128.34 : 864,208.31 = 155,403 : x
  2. Step 2: Convert to fraction form
    576,128.34/864,208.31 = 155,403/x
  3. Step 3: Cross multiply
    576,128.34x = 864,208.31 × 155,403
  4. Step 4: Simplify right side
    576,128.34x = 134,300,563,221.92
  5. Step 5: Solve for x
    x = 134,300,563,221.92/576,128.34
  6. Step 6: Final answer
    x = 233,108.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.