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Finding the Fourth Proportional to 528,008, 728,352.96 and 312,936.80

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Solution

The fourth proportional to 528,008, 728,352.96 and 312,936.80 is: 431,676.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,008 : 728,352.96 = 312,936.80 : x
  2. Step 2: Convert to fraction form
    528,008/728,352.96 = 312,936.80/x
  3. Step 3: Cross multiply
    528,008x = 728,352.96 × 312,936.80
  4. Step 4: Simplify right side
    528,008x = 227,928,444,572.93
  5. Step 5: Solve for x
    x = 227,928,444,572.93/528,008
  6. Step 6: Final answer
    x = 431,676.12

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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.