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Finding the Fourth Proportional to 528,605.76, 729,481.20 and 286,890.48

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Solution

The fourth proportional to 528,605.76, 729,481.20 and 286,890.48 is: 395,911.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,605.76 : 729,481.20 = 286,890.48 : x
  2. Step 2: Convert to fraction form
    528,605.76/729,481.20 = 286,890.48/x
  3. Step 3: Cross multiply
    528,605.76x = 729,481.20 × 286,890.48
  4. Step 4: Simplify right side
    528,605.76x = 209,281,211,618.98
  5. Step 5: Solve for x
    x = 209,281,211,618.98/528,605.76
  6. Step 6: Final answer
    x = 395,911.71

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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.