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Finding the Fourth Proportional to 529,145.57, 730,234.06 and 287,428.07

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Solution

The fourth proportional to 529,145.57, 730,234.06 and 287,428.07 is: 396,657.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,145.57 : 730,234.06 = 287,428.07 : x
  2. Step 2: Convert to fraction form
    529,145.57/730,234.06 = 287,428.07/x
  3. Step 3: Cross multiply
    529,145.57x = 730,234.06 × 287,428.07
  4. Step 4: Simplify right side
    529,145.57x = 209,889,763,251.34
  5. Step 5: Solve for x
    x = 209,889,763,251.34/529,145.57
  6. Step 6: Final answer
    x = 396,657.89

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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.