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Finding the Fourth Proportional to 530,696.73, 732,339.48 and 288,978.72

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Solution

The fourth proportional to 530,696.73, 732,339.48 and 288,978.72 is: 398,778.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,696.73 : 732,339.48 = 288,978.72 : x
  2. Step 2: Convert to fraction form
    530,696.73/732,339.48 = 288,978.72/x
  3. Step 3: Cross multiply
    530,696.73x = 732,339.48 × 288,978.72
  4. Step 4: Simplify right side
    530,696.73x = 211,630,525,535.87
  5. Step 5: Solve for x
    x = 211,630,525,535.87/530,696.73
  6. Step 6: Final answer
    x = 398,778.65

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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.