Home / 628,815.66-867,783.78-342,340.62

Finding the Fourth Proportional to 628,815.66, 867,783.78 and 342,340.62

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Solution

The fourth proportional to 628,815.66, 867,783.78 and 342,340.62 is: 472,439.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,815.66 : 867,783.78 = 342,340.62 : x
  2. Step 2: Convert to fraction form
    628,815.66/867,783.78 = 342,340.62/x
  3. Step 3: Cross multiply
    628,815.66x = 867,783.78 × 342,340.62
  4. Step 4: Simplify right side
    628,815.66x = 297,077,637,271.14
  5. Step 5: Solve for x
    x = 297,077,637,271.14/628,815.66
  6. Step 6: Final answer
    x = 472,439.95

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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.