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Finding the Fourth Proportional to 666,689.99, 920,025.18 and 360,759.69

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Solution

The fourth proportional to 666,689.99, 920,025.18 and 360,759.69 is: 497,844.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,689.99 : 920,025.18 = 360,759.69 : x
  2. Step 2: Convert to fraction form
    666,689.99/920,025.18 = 360,759.69/x
  3. Step 3: Cross multiply
    666,689.99x = 920,025.18 × 360,759.69
  4. Step 4: Simplify right side
    666,689.99x = 331,907,998,728.99
  5. Step 5: Solve for x
    x = 331,907,998,728.99/666,689.99
  6. Step 6: Final answer
    x = 497,844.58

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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.