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Finding the Fourth Proportional to 528,850.61, 729,809.56 and 287,128.38

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Solution

The fourth proportional to 528,850.61, 729,809.56 and 287,128.38 is: 396,234.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,850.61 : 729,809.56 = 287,128.38 : x
  2. Step 2: Convert to fraction form
    528,850.61/729,809.56 = 287,128.38/x
  3. Step 3: Cross multiply
    528,850.61x = 729,809.56 × 287,128.38
  4. Step 4: Simplify right side
    528,850.61x = 209,549,036,671.31
  5. Step 5: Solve for x
    x = 209,549,036,671.31/528,850.61
  6. Step 6: Final answer
    x = 396,234.84

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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.