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Finding the Fourth Proportional to 666,758.93, 920,120.14 and 360,828.55

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Solution

The fourth proportional to 666,758.93, 920,120.14 and 360,828.55 is: 497,939.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,758.93 : 920,120.14 = 360,828.55 : x
  2. Step 2: Convert to fraction form
    666,758.93/920,120.14 = 360,828.55/x
  3. Step 3: Cross multiply
    666,758.93x = 920,120.14 × 360,828.55
  4. Step 4: Simplify right side
    666,758.93x = 332,005,615,942.00
  5. Step 5: Solve for x
    x = 332,005,615,942.00/666,758.93
  6. Step 6: Final answer
    x = 497,939.51

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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.