Home / 638,210.64-880,880.77-396,675.63

Finding the Fourth Proportional to 638,210.64, 880,880.77 and 396,675.63

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Solution

The fourth proportional to 638,210.64, 880,880.77 and 396,675.63 is: 547,505.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,210.64 : 880,880.77 = 396,675.63 : x
  2. Step 2: Convert to fraction form
    638,210.64/880,880.77 = 396,675.63/x
  3. Step 3: Cross multiply
    638,210.64x = 880,880.77 × 396,675.63
  4. Step 4: Simplify right side
    638,210.64x = 349,423,934,890.48
  5. Step 5: Solve for x
    x = 349,423,934,890.48/638,210.64
  6. Step 6: Final answer
    x = 547,505.65

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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.