Home / 639,110.40-958,204.80-417,619.20

Finding the Fourth Proportional to 639,110.40, 958,204.80 and 417,619.20

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Solution

The fourth proportional to 639,110.40, 958,204.80 and 417,619.20 is: 626,127.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,110.40 : 958,204.80 = 417,619.20 : x
  2. Step 2: Convert to fraction form
    639,110.40/958,204.80 = 417,619.20/x
  3. Step 3: Cross multiply
    639,110.40x = 958,204.80 × 417,619.20
  4. Step 4: Simplify right side
    639,110.40x = 400,164,722,012.16
  5. Step 5: Solve for x
    x = 400,164,722,012.16/639,110.40
  6. Step 6: Final answer
    x = 626,127.70

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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.