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Finding the Fourth Proportional to 432,996.80, 649,495.20 and 291,279.20

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Solution

The fourth proportional to 432,996.80, 649,495.20 and 291,279.20 is: 436,918.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,996.80 : 649,495.20 = 291,279.20 : x
  2. Step 2: Convert to fraction form
    432,996.80/649,495.20 = 291,279.20/x
  3. Step 3: Cross multiply
    432,996.80x = 649,495.20 × 291,279.20
  4. Step 4: Simplify right side
    432,996.80x = 189,184,442,259.84
  5. Step 5: Solve for x
    x = 189,184,442,259.84/432,996.80
  6. Step 6: Final answer
    x = 436,918.80

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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.