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Finding the Fourth Proportional to 556,457.70, 834,720.38 and 157,128.59

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Solution

The fourth proportional to 556,457.70, 834,720.38 and 157,128.59 is: 235,702.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,457.70 : 834,720.38 = 157,128.59 : x
  2. Step 2: Convert to fraction form
    556,457.70/834,720.38 = 157,128.59/x
  3. Step 3: Cross multiply
    556,457.70x = 834,720.38 × 157,128.59
  4. Step 4: Simplify right side
    556,457.70x = 131,158,436,353.66
  5. Step 5: Solve for x
    x = 131,158,436,353.66/556,457.70
  6. Step 6: Final answer
    x = 235,702.44

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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.