Home / 712,099.78-982,698.94-389,810.08

Finding the Fourth Proportional to 712,099.78, 982,698.94 and 389,810.08

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Solution

The fourth proportional to 712,099.78, 982,698.94 and 389,810.08 is: 537,938.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,099.78 : 982,698.94 = 389,810.08 : x
  2. Step 2: Convert to fraction form
    712,099.78/982,698.94 = 389,810.08/x
  3. Step 3: Cross multiply
    712,099.78x = 982,698.94 × 389,810.08
  4. Step 4: Simplify right side
    712,099.78x = 383,065,952,417.32
  5. Step 5: Solve for x
    x = 383,065,952,417.32/712,099.78
  6. Step 6: Final answer
    x = 537,938.59

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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.