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Finding the Fourth Proportional to 666,938.08, 920,462.20 and 380,392.48

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Solution

The fourth proportional to 666,938.08, 920,462.20 and 380,392.48 is: 524,991.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,938.08 : 920,462.20 = 380,392.48 : x
  2. Step 2: Convert to fraction form
    666,938.08/920,462.20 = 380,392.48/x
  3. Step 3: Cross multiply
    666,938.08x = 920,462.20 × 380,392.48
  4. Step 4: Simplify right side
    666,938.08x = 350,136,899,004.26
  5. Step 5: Solve for x
    x = 350,136,899,004.26/666,938.08
  6. Step 6: Final answer
    x = 524,991.61

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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.