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Finding the Fourth Proportional to 528,676.34, 729,021.74 and 313,774.83

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Solution

The fourth proportional to 528,676.34, 729,021.74 and 313,774.83 is: 432,681.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,676.34 : 729,021.74 = 313,774.83 : x
  2. Step 2: Convert to fraction form
    528,676.34/729,021.74 = 313,774.83/x
  3. Step 3: Cross multiply
    528,676.34x = 729,021.74 × 313,774.83
  4. Step 4: Simplify right side
    528,676.34x = 228,748,670,965.93
  5. Step 5: Solve for x
    x = 228,748,670,965.93/528,676.34
  6. Step 6: Final answer
    x = 432,681.88

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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.