Home / 638,810,108.20-958,215,162.30-420,706,721.80

Finding the Fourth Proportional to 638,810,108.20, 958,215,162.30 and 420,706,721.80

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Solution

The fourth proportional to 638,810,108.20, 958,215,162.30 and 420,706,721.80 is: 631,060,082.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,810,108.20 : 958,215,162.30 = 420,706,721.80 : x
  2. Step 2: Convert to fraction form
    638,810,108.20/958,215,162.30 = 420,706,721.80/x
  3. Step 3: Cross multiply
    638,810,108.20x = 958,215,162.30 × 420,706,721.80
  4. Step 4: Simplify right side
    638,810,108.20x = 403,127,559,710,287,936
  5. Step 5: Solve for x
    x = 403,127,559,710,287,936/638,810,108.20
  6. Step 6: Final answer
    x = 631,060,082.70

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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.