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Finding the Fourth Proportional to 553,749.61, 764,190.34 and 312,018.88

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Solution

The fourth proportional to 553,749.61, 764,190.34 and 312,018.88 is: 430,595.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,749.61 : 764,190.34 = 312,018.88 : x
  2. Step 2: Convert to fraction form
    553,749.61/764,190.34 = 312,018.88/x
  3. Step 3: Cross multiply
    553,749.61x = 764,190.34 × 312,018.88
  4. Step 4: Simplify right side
    553,749.61x = 238,441,813,993.62
  5. Step 5: Solve for x
    x = 238,441,813,993.62/553,749.61
  6. Step 6: Final answer
    x = 430,595.00

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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.