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Finding the Fourth Proportional to 432,008.60, 647,705.70 and 165,666.20

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Solution

The fourth proportional to 432,008.60, 647,705.70 and 165,666.20 is: 248,381.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,008.60 : 647,705.70 = 165,666.20 : x
  2. Step 2: Convert to fraction form
    432,008.60/647,705.70 = 165,666.20/x
  3. Step 3: Cross multiply
    432,008.60x = 647,705.70 × 165,666.20
  4. Step 4: Simplify right side
    432,008.60x = 107,302,942,037.34
  5. Step 5: Solve for x
    x = 107,302,942,037.34/432,008.60
  6. Step 6: Final answer
    x = 248,381.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.