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Finding the Fourth Proportional to 245,435.20, 368,368.80 and 145,470.40

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Solution

The fourth proportional to 245,435.20, 368,368.80 and 145,470.40 is: 218,333.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,435.20 : 368,368.80 = 145,470.40 : x
  2. Step 2: Convert to fraction form
    245,435.20/368,368.80 = 145,470.40/x
  3. Step 3: Cross multiply
    245,435.20x = 368,368.80 × 145,470.40
  4. Step 4: Simplify right side
    245,435.20x = 53,586,756,683.52
  5. Step 5: Solve for x
    x = 53,586,756,683.52/245,435.20
  6. Step 6: Final answer
    x = 218,333.62

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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.