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Finding the Fourth Proportional to 489,945.60, 734,918.40 and 157,555.20

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Solution

The fourth proportional to 489,945.60, 734,918.40 and 157,555.20 is: 236,332.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,945.60 : 734,918.40 = 157,555.20 : x
  2. Step 2: Convert to fraction form
    489,945.60/734,918.40 = 157,555.20/x
  3. Step 3: Cross multiply
    489,945.60x = 734,918.40 × 157,555.20
  4. Step 4: Simplify right side
    489,945.60x = 115,790,215,495.68
  5. Step 5: Solve for x
    x = 115,790,215,495.68/489,945.60
  6. Step 6: Final answer
    x = 236,332.80

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Double scale
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Similar ratio
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1.5x scale

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.