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Finding the Fourth Proportional to 528,794.10, 729,748.55 and 287,086.86

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Solution

The fourth proportional to 528,794.10, 729,748.55 and 287,086.86 is: 396,186.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,794.10 : 729,748.55 = 287,086.86 : x
  2. Step 2: Convert to fraction form
    528,794.10/729,748.55 = 287,086.86/x
  3. Step 3: Cross multiply
    528,794.10x = 729,748.55 × 287,086.86
  4. Step 4: Simplify right side
    528,794.10x = 209,501,219,809.05
  5. Step 5: Solve for x
    x = 209,501,219,809.05/528,794.10
  6. Step 6: Final answer
    x = 396,186.76

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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.