Home / 691,869.54-954,778.39-390,061.38

Finding the Fourth Proportional to 691,869.54, 954,778.39 and 390,061.38

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Solution

The fourth proportional to 691,869.54, 954,778.39 and 390,061.38 is: 538,283.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,869.54 : 954,778.39 = 390,061.38 : x
  2. Step 2: Convert to fraction form
    691,869.54/954,778.39 = 390,061.38/x
  3. Step 3: Cross multiply
    691,869.54x = 954,778.39 × 390,061.38
  4. Step 4: Simplify right side
    691,869.54x = 372,422,176,397.58
  5. Step 5: Solve for x
    x = 372,422,176,397.58/691,869.54
  6. Step 6: Final answer
    x = 538,283.82

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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.