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Finding the Fourth Proportional to 528,608.95, 729,480.85 and 286,891.67

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Solution

The fourth proportional to 528,608.95, 729,480.85 and 286,891.67 is: 395,910.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,608.95 : 729,480.85 = 286,891.67 : x
  2. Step 2: Convert to fraction form
    528,608.95/729,480.85 = 286,891.67/x
  3. Step 3: Cross multiply
    528,608.95x = 729,480.85 × 286,891.67
  4. Step 4: Simplify right side
    528,608.95x = 209,281,980,395.99
  5. Step 5: Solve for x
    x = 209,281,980,395.99/528,608.95
  6. Step 6: Final answer
    x = 395,910.78

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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.