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Finding the Fourth Proportional to 528,766.80, 729,698.67 and 287,049.30

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Solution

The fourth proportional to 528,766.80, 729,698.67 and 287,049.30 is: 396,128.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,766.80 : 729,698.67 = 287,049.30 : x
  2. Step 2: Convert to fraction form
    528,766.80/729,698.67 = 287,049.30/x
  3. Step 3: Cross multiply
    528,766.80x = 729,698.67 × 287,049.30
  4. Step 4: Simplify right side
    528,766.80x = 209,459,492,434.43
  5. Step 5: Solve for x
    x = 209,459,492,434.43/528,766.80
  6. Step 6: Final answer
    x = 396,128.30

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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.