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Finding the Fourth Proportional to 666,761.02, 920,123.10 and 360,830.74

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Solution

The fourth proportional to 666,761.02, 920,123.10 and 360,830.74 is: 497,942.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,761.02 : 920,123.10 = 360,830.74 : x
  2. Step 2: Convert to fraction form
    666,761.02/920,123.10 = 360,830.74/x
  3. Step 3: Cross multiply
    666,761.02x = 920,123.10 × 360,830.74
  4. Step 4: Simplify right side
    666,761.02x = 332,008,699,064.09
  5. Step 5: Solve for x
    x = 332,008,699,064.09/666,761.02
  6. Step 6: Final answer
    x = 497,942.57

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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.