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Finding the Fourth Proportional to 528,796.10, 729,751.32 and 287,088.86

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Solution

The fourth proportional to 528,796.10, 729,751.32 and 287,088.86 is: 396,189.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,796.10 : 729,751.32 = 287,088.86 : x
  2. Step 2: Convert to fraction form
    528,796.10/729,751.32 = 287,088.86/x
  3. Step 3: Cross multiply
    528,796.10x = 729,751.32 × 287,088.86
  4. Step 4: Simplify right side
    528,796.10x = 209,503,474,542.30
  5. Step 5: Solve for x
    x = 209,503,474,542.30/528,796.10
  6. Step 6: Final answer
    x = 396,189.52

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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.