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Finding the Fourth Proportional to 353,945.20, 530,140.20 and 307,289.20

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Solution

The fourth proportional to 353,945.20, 530,140.20 and 307,289.20 is: 460,258.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,945.20 : 530,140.20 = 307,289.20 : x
  2. Step 2: Convert to fraction form
    353,945.20/530,140.20 = 307,289.20/x
  3. Step 3: Cross multiply
    353,945.20x = 530,140.20 × 307,289.20
  4. Step 4: Simplify right side
    353,945.20x = 162,906,357,945.84
  5. Step 5: Solve for x
    x = 162,906,357,945.84/353,945.20
  6. Step 6: Final answer
    x = 460,258.70

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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.