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Finding the Fourth Proportional to 677,457.06, 934,624.03 and 390,921.78

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Solution

The fourth proportional to 677,457.06, 934,624.03 and 390,921.78 is: 539,318.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,457.06 : 934,624.03 = 390,921.78 : x
  2. Step 2: Convert to fraction form
    677,457.06/934,624.03 = 390,921.78/x
  3. Step 3: Cross multiply
    677,457.06x = 934,624.03 × 390,921.78
  4. Step 4: Simplify right side
    677,457.06x = 365,364,889,438.37
  5. Step 5: Solve for x
    x = 365,364,889,438.37/677,457.06
  6. Step 6: Final answer
    x = 539,318.15

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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.