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Finding the Fourth Proportional to 529,478.08, 730,685.40 and 287,760.67

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Solution

The fourth proportional to 529,478.08, 730,685.40 and 287,760.67 is: 397,112.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,478.08 : 730,685.40 = 287,760.67 : x
  2. Step 2: Convert to fraction form
    529,478.08/730,685.40 = 287,760.67/x
  3. Step 3: Cross multiply
    529,478.08x = 730,685.40 × 287,760.67
  4. Step 4: Simplify right side
    529,478.08x = 210,262,517,357.40
  5. Step 5: Solve for x
    x = 210,262,517,357.40/529,478.08
  6. Step 6: Final answer
    x = 397,112.79

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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.