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Finding the Fourth Proportional to 707,728.32, 976,659.12 and 492,987.60

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Solution

The fourth proportional to 707,728.32, 976,659.12 and 492,987.60 is: 680,318.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,728.32 : 976,659.12 = 492,987.60 : x
  2. Step 2: Convert to fraction form
    707,728.32/976,659.12 = 492,987.60/x
  3. Step 3: Cross multiply
    707,728.32x = 976,659.12 × 492,987.60
  4. Step 4: Simplify right side
    707,728.32x = 481,480,835,586.91
  5. Step 5: Solve for x
    x = 481,480,835,586.91/707,728.32
  6. Step 6: Final answer
    x = 680,318.74

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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.