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Finding the Fourth Proportional to 457,329.72, 685,994.58 and 190,945.20

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Solution

The fourth proportional to 457,329.72, 685,994.58 and 190,945.20 is: 286,417.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,329.72 : 685,994.58 = 190,945.20 : x
  2. Step 2: Convert to fraction form
    457,329.72/685,994.58 = 190,945.20/x
  3. Step 3: Cross multiply
    457,329.72x = 685,994.58 × 190,945.20
  4. Step 4: Simplify right side
    457,329.72x = 130,987,372,277.02
  5. Step 5: Solve for x
    x = 130,987,372,277.02/457,329.72
  6. Step 6: Final answer
    x = 286,417.80

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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.