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Finding the Fourth Proportional to 493,356.40, 740,034.60 and 138,430.60

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Solution

The fourth proportional to 493,356.40, 740,034.60 and 138,430.60 is: 207,645.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,356.40 : 740,034.60 = 138,430.60 : x
  2. Step 2: Convert to fraction form
    493,356.40/740,034.60 = 138,430.60/x
  3. Step 3: Cross multiply
    493,356.40x = 740,034.60 × 138,430.60
  4. Step 4: Simplify right side
    493,356.40x = 102,443,433,698.76
  5. Step 5: Solve for x
    x = 102,443,433,698.76/493,356.40
  6. Step 6: Final answer
    x = 207,645.90

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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.