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Finding the Fourth Proportional to 425,318.40, 637,977.60 and 318,009.60

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Solution

The fourth proportional to 425,318.40, 637,977.60 and 318,009.60 is: 477,014.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,318.40 : 637,977.60 = 318,009.60 : x
  2. Step 2: Convert to fraction form
    425,318.40/637,977.60 = 318,009.60/x
  3. Step 3: Cross multiply
    425,318.40x = 637,977.60 × 318,009.60
  4. Step 4: Simplify right side
    425,318.40x = 202,883,001,384.96
  5. Step 5: Solve for x
    x = 202,883,001,384.96/425,318.40
  6. Step 6: Final answer
    x = 477,014.40

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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.