Home / 646,175.78-891,822.84-388,196.34

Finding the Fourth Proportional to 646,175.78, 891,822.84 and 388,196.34

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Solution

The fourth proportional to 646,175.78, 891,822.84 and 388,196.34 is: 535,771.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,175.78 : 891,822.84 = 388,196.34 : x
  2. Step 2: Convert to fraction form
    646,175.78/891,822.84 = 388,196.34/x
  3. Step 3: Cross multiply
    646,175.78x = 891,822.84 × 388,196.34
  4. Step 4: Simplify right side
    646,175.78x = 346,202,362,416.41
  5. Step 5: Solve for x
    x = 346,202,362,416.41/646,175.78
  6. Step 6: Final answer
    x = 535,771.19

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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.