Home / 926,455.80-1,388,646.90-393,886.20

Finding the Fourth Proportional to 926,455.80, 1,388,646.90 and 393,886.20

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Solution

The fourth proportional to 926,455.80, 1,388,646.90 and 393,886.20 is: 590,388.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    926,455.80 : 1,388,646.90 = 393,886.20 : x
  2. Step 2: Convert to fraction form
    926,455.80/1,388,646.90 = 393,886.20/x
  3. Step 3: Cross multiply
    926,455.80x = 1,388,646.90 × 393,886.20
  4. Step 4: Simplify right side
    926,455.80x = 546,968,850,582.78
  5. Step 5: Solve for x
    x = 546,968,850,582.78/926,455.80
  6. Step 6: Final answer
    x = 590,388.50

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.