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Finding the Fourth Proportional to 666,021.12, 918,495.69 and 436,494.80

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Solution

The fourth proportional to 666,021.12, 918,495.69 and 436,494.80 is: 601,960.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,021.12 : 918,495.69 = 436,494.80 : x
  2. Step 2: Convert to fraction form
    666,021.12/918,495.69 = 436,494.80/x
  3. Step 3: Cross multiply
    666,021.12x = 918,495.69 × 436,494.80
  4. Step 4: Simplify right side
    666,021.12x = 400,918,587,914.93
  5. Step 5: Solve for x
    x = 400,918,587,914.93/666,021.12
  6. Step 6: Final answer
    x = 601,960.77

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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.