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Finding the Fourth Proportional to 373,643.47, 515,493.26 and 287,628.76

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Solution

The fourth proportional to 373,643.47, 515,493.26 and 287,628.76 is: 396,823.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,643.47 : 515,493.26 = 287,628.76 : x
  2. Step 2: Convert to fraction form
    373,643.47/515,493.26 = 287,628.76/x
  3. Step 3: Cross multiply
    373,643.47x = 515,493.26 × 287,628.76
  4. Step 4: Simplify right side
    373,643.47x = 148,270,685,303.76
  5. Step 5: Solve for x
    x = 148,270,685,303.76/373,643.47
  6. Step 6: Final answer
    x = 396,823.98

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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.