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Finding the Fourth Proportional to 553,818.38, 764,291.86 and 312,111.14

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Solution

The fourth proportional to 553,818.38, 764,291.86 and 312,111.14 is: 430,726.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,818.38 : 764,291.86 = 312,111.14 : x
  2. Step 2: Convert to fraction form
    553,818.38/764,291.86 = 312,111.14/x
  3. Step 3: Cross multiply
    553,818.38x = 764,291.86 × 312,111.14
  4. Step 4: Simplify right side
    553,818.38x = 238,544,003,717.32
  5. Step 5: Solve for x
    x = 238,544,003,717.32/553,818.38
  6. Step 6: Final answer
    x = 430,726.05

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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.