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Finding the Fourth Proportional to 716,005.25, 988,053.41 and 393,728.93

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Solution

The fourth proportional to 716,005.25, 988,053.41 and 393,728.93 is: 543,327.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,005.25 : 988,053.41 = 393,728.93 : x
  2. Step 2: Convert to fraction form
    716,005.25/988,053.41 = 393,728.93/x
  3. Step 3: Cross multiply
    716,005.25x = 988,053.41 × 393,728.93
  4. Step 4: Simplify right side
    716,005.25x = 389,025,207,946.21
  5. Step 5: Solve for x
    x = 389,025,207,946.21/716,005.25
  6. Step 6: Final answer
    x = 543,327.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.