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Finding the Fourth Proportional to 287,649.50, 397,141.18 and 185,720.72

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Solution

The fourth proportional to 287,649.50, 397,141.18 and 185,720.72 is: 256,413.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,649.50 : 397,141.18 = 185,720.72 : x
  2. Step 2: Convert to fraction form
    287,649.50/397,141.18 = 185,720.72/x
  3. Step 3: Cross multiply
    287,649.50x = 397,141.18 × 185,720.72
  4. Step 4: Simplify right side
    287,649.50x = 73,757,343,441.24
  5. Step 5: Solve for x
    x = 73,757,343,441.24/287,649.50
  6. Step 6: Final answer
    x = 256,413.95

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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.