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Finding the Fourth Proportional to 528,651.18, 729,519.08 and 286,928.57

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Solution

The fourth proportional to 528,651.18, 729,519.08 and 286,928.57 is: 395,950.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,651.18 : 729,519.08 = 286,928.57 : x
  2. Step 2: Convert to fraction form
    528,651.18/729,519.08 = 286,928.57/x
  3. Step 3: Cross multiply
    528,651.18x = 729,519.08 × 286,928.57
  4. Step 4: Simplify right side
    528,651.18x = 209,319,861,329.88
  5. Step 5: Solve for x
    x = 209,319,861,329.88/528,651.18
  6. Step 6: Final answer
    x = 395,950.81

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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.