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Finding the Fourth Proportional to 407,318.40, 610,977.60 and 265,603.20

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Solution

The fourth proportional to 407,318.40, 610,977.60 and 265,603.20 is: 398,404.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,318.40 : 610,977.60 = 265,603.20 : x
  2. Step 2: Convert to fraction form
    407,318.40/610,977.60 = 265,603.20/x
  3. Step 3: Cross multiply
    407,318.40x = 610,977.60 × 265,603.20
  4. Step 4: Simplify right side
    407,318.40x = 162,277,605,688.32
  5. Step 5: Solve for x
    x = 162,277,605,688.32/407,318.40
  6. Step 6: Final answer
    x = 398,404.80

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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.