Home / 657,815.20-987,111.60-433,823.20

Finding the Fourth Proportional to 657,815.20, 987,111.60 and 433,823.20

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Solution

The fourth proportional to 657,815.20, 987,111.60 and 433,823.20 is: 650,991.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,815.20 : 987,111.60 = 433,823.20 : x
  2. Step 2: Convert to fraction form
    657,815.20/987,111.60 = 433,823.20/x
  3. Step 3: Cross multiply
    657,815.20x = 987,111.60 × 433,823.20
  4. Step 4: Simplify right side
    657,815.20x = 428,231,913,069.12
  5. Step 5: Solve for x
    x = 428,231,913,069.12/657,815.20
  6. Step 6: Final answer
    x = 650,991.21

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Double scale
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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.