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Finding the Fourth Proportional to 437,552.70, 656,329.05 and 105,128.70

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Solution

The fourth proportional to 437,552.70, 656,329.05 and 105,128.70 is: 157,693.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,552.70 : 656,329.05 = 105,128.70 : x
  2. Step 2: Convert to fraction form
    437,552.70/656,329.05 = 105,128.70/x
  3. Step 3: Cross multiply
    437,552.70x = 656,329.05 × 105,128.70
  4. Step 4: Simplify right side
    437,552.70x = 68,999,019,798.74
  5. Step 5: Solve for x
    x = 68,999,019,798.74/437,552.70
  6. Step 6: Final answer
    x = 157,693.05

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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.