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Finding the Fourth Proportional to 528,109.56, 790,272 and 457,276.68

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Solution

The fourth proportional to 528,109.56, 790,272 and 457,276.68 is: 684,276.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,109.56 : 790,272 = 457,276.68 : x
  2. Step 2: Convert to fraction form
    528,109.56/790,272 = 457,276.68/x
  3. Step 3: Cross multiply
    528,109.56x = 790,272 × 457,276.68
  4. Step 4: Simplify right side
    528,109.56x = 361,372,956,456.96
  5. Step 5: Solve for x
    x = 361,372,956,456.96/528,109.56
  6. Step 6: Final answer
    x = 684,276.49

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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.