Home / 639,111.40-958,206.30-417,620.20

Finding the Fourth Proportional to 639,111.40, 958,206.30 and 417,620.20

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Solution

The fourth proportional to 639,111.40, 958,206.30 and 417,620.20 is: 626,129.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,111.40 : 958,206.30 = 417,620.20 : x
  2. Step 2: Convert to fraction form
    639,111.40/958,206.30 = 417,620.20/x
  3. Step 3: Cross multiply
    639,111.40x = 958,206.30 × 417,620.20
  4. Step 4: Simplify right side
    639,111.40x = 400,166,306,647.26
  5. Step 5: Solve for x
    x = 400,166,306,647.26/639,111.40
  6. Step 6: Final answer
    x = 626,129.20

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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.