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Finding the Fourth Proportional to 666,764.69, 920,128.08 and 360,834.30

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Solution

The fourth proportional to 666,764.69, 920,128.08 and 360,834.30 is: 497,947.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,764.69 : 920,128.08 = 360,834.30 : x
  2. Step 2: Convert to fraction form
    666,764.69/920,128.08 = 360,834.30/x
  3. Step 3: Cross multiply
    666,764.69x = 920,128.08 × 360,834.30
  4. Step 4: Simplify right side
    666,764.69x = 332,013,771,657.14
  5. Step 5: Solve for x
    x = 332,013,771,657.14/666,764.69
  6. Step 6: Final answer
    x = 497,947.44

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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.