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Finding the Fourth Proportional to 666,247.50, 919,421.55 and 364,447.98

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Solution

The fourth proportional to 666,247.50, 919,421.55 and 364,447.98 is: 502,938.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,247.50 : 919,421.55 = 364,447.98 : x
  2. Step 2: Convert to fraction form
    666,247.50/919,421.55 = 364,447.98/x
  3. Step 3: Cross multiply
    666,247.50x = 919,421.55 × 364,447.98
  4. Step 4: Simplify right side
    666,247.50x = 335,081,326,665.97
  5. Step 5: Solve for x
    x = 335,081,326,665.97/666,247.50
  6. Step 6: Final answer
    x = 502,938.21

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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.