Home / 677,388.36-934,583.22-390,870.84

Finding the Fourth Proportional to 677,388.36, 934,583.22 and 390,870.84

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Solution

The fourth proportional to 677,388.36, 934,583.22 and 390,870.84 is: 539,279.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,388.36 : 934,583.22 = 390,870.84 : x
  2. Step 2: Convert to fraction form
    677,388.36/934,583.22 = 390,870.84/x
  3. Step 3: Cross multiply
    677,388.36x = 934,583.22 × 390,870.84
  4. Step 4: Simplify right side
    677,388.36x = 365,301,328,251.31
  5. Step 5: Solve for x
    x = 365,301,328,251.31/677,388.36
  6. Step 6: Final answer
    x = 539,279.02

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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.