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Finding the Fourth Proportional to 666,765.69, 920,129.46 and 360,835.30

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Solution

The fourth proportional to 666,765.69, 920,129.46 and 360,835.30 is: 497,948.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,765.69 : 920,129.46 = 360,835.30 : x
  2. Step 2: Convert to fraction form
    666,765.69/920,129.46 = 360,835.30/x
  3. Step 3: Cross multiply
    666,765.69x = 920,129.46 × 360,835.30
  4. Step 4: Simplify right side
    666,765.69x = 332,015,189,737.94
  5. Step 5: Solve for x
    x = 332,015,189,737.94/666,765.69
  6. Step 6: Final answer
    x = 497,948.82

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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.