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Finding the Fourth Proportional to 528,210.09, 728,939.85 and 324,158.87

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Solution

The fourth proportional to 528,210.09, 728,939.85 and 324,158.87 is: 447,345.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,210.09 : 728,939.85 = 324,158.87 : x
  2. Step 2: Convert to fraction form
    528,210.09/728,939.85 = 324,158.87/x
  3. Step 3: Cross multiply
    528,210.09x = 728,939.85 × 324,158.87
  4. Step 4: Simplify right side
    528,210.09x = 236,292,318,073.97
  5. Step 5: Solve for x
    x = 236,292,318,073.97/528,210.09
  6. Step 6: Final answer
    x = 447,345.33

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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.