Home / 689,938.32-952,113.40-388,132.32

Finding the Fourth Proportional to 689,938.32, 952,113.40 and 388,132.32

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Solution

The fourth proportional to 689,938.32, 952,113.40 and 388,132.32 is: 535,621.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,938.32 : 952,113.40 = 388,132.32 : x
  2. Step 2: Convert to fraction form
    689,938.32/952,113.40 = 388,132.32/x
  3. Step 3: Cross multiply
    689,938.32x = 952,113.40 × 388,132.32
  4. Step 4: Simplify right side
    689,938.32x = 369,545,982,845.09
  5. Step 5: Solve for x
    x = 369,545,982,845.09/689,938.32
  6. Step 6: Final answer
    x = 535,621.77

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Double scale
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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.