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Finding the Fourth Proportional to 931,714.80, 1,397,701.80 and 399,231.60

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Solution

The fourth proportional to 931,714.80, 1,397,701.80 and 399,231.60 is: 598,902.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    931,714.80 : 1,397,701.80 = 399,231.60 : x
  2. Step 2: Convert to fraction form
    931,714.80/1,397,701.80 = 399,231.60/x
  3. Step 3: Cross multiply
    931,714.80x = 1,397,701.80 × 399,231.60
  4. Step 4: Simplify right side
    931,714.80x = 558,006,725,936.88
  5. Step 5: Solve for x
    x = 558,006,725,936.88/931,714.80
  6. Step 6: Final answer
    x = 598,902.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.