Home / 656,945.10-906,583.86-355,139.10

Finding the Fourth Proportional to 656,945.10, 906,583.86 and 355,139.10

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Solution

The fourth proportional to 656,945.10, 906,583.86 and 355,139.10 is: 490,091.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,945.10 : 906,583.86 = 355,139.10 : x
  2. Step 2: Convert to fraction form
    656,945.10/906,583.86 = 355,139.10/x
  3. Step 3: Cross multiply
    656,945.10x = 906,583.86 × 355,139.10
  4. Step 4: Simplify right side
    656,945.10x = 321,963,376,114.93
  5. Step 5: Solve for x
    x = 321,963,376,114.93/656,945.10
  6. Step 6: Final answer
    x = 490,091.75

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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.