Home / 718,263.56-991,211.36-395,985.20

Finding the Fourth Proportional to 718,263.56, 991,211.36 and 395,985.20

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Solution

The fourth proportional to 718,263.56, 991,211.36 and 395,985.20 is: 546,463.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,263.56 : 991,211.36 = 395,985.20 : x
  2. Step 2: Convert to fraction form
    718,263.56/991,211.36 = 395,985.20/x
  3. Step 3: Cross multiply
    718,263.56x = 991,211.36 × 395,985.20
  4. Step 4: Simplify right side
    718,263.56x = 392,505,028,631.87
  5. Step 5: Solve for x
    x = 392,505,028,631.87/718,263.56
  6. Step 6: Final answer
    x = 546,463.79

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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.