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Finding the Fourth Proportional to 640,505.76, 960,736.86 and 303,707.76

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Solution

The fourth proportional to 640,505.76, 960,736.86 and 303,707.76 is: 455,551.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,505.76 : 960,736.86 = 303,707.76 : x
  2. Step 2: Convert to fraction form
    640,505.76/960,736.86 = 303,707.76/x
  3. Step 3: Cross multiply
    640,505.76x = 960,736.86 × 303,707.76
  4. Step 4: Simplify right side
    640,505.76x = 291,783,239,700.03
  5. Step 5: Solve for x
    x = 291,783,239,700.03/640,505.76
  6. Step 6: Final answer
    x = 455,551.31

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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.