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Finding the Fourth Proportional to 666,761.55, 920,133.87 and 360,837.98

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Solution

The fourth proportional to 666,761.55, 920,133.87 and 360,837.98 is: 497,958.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,761.55 : 920,133.87 = 360,837.98 : x
  2. Step 2: Convert to fraction form
    666,761.55/920,133.87 = 360,837.98/x
  3. Step 3: Cross multiply
    666,761.55x = 920,133.87 × 360,837.98
  4. Step 4: Simplify right side
    666,761.55x = 332,019,246,980.38
  5. Step 5: Solve for x
    x = 332,019,246,980.38/666,761.55
  6. Step 6: Final answer
    x = 497,958.00

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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.