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Finding the Fourth Proportional to 427,792.54, 642,319.61 and 238,622.51

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Solution

The fourth proportional to 427,792.54, 642,319.61 and 238,622.51 is: 358,285.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,792.54 : 642,319.61 = 238,622.51 : x
  2. Step 2: Convert to fraction form
    427,792.54/642,319.61 = 238,622.51/x
  3. Step 3: Cross multiply
    427,792.54x = 642,319.61 × 238,622.51
  4. Step 4: Simplify right side
    427,792.54x = 153,271,913,155.71
  5. Step 5: Solve for x
    x = 153,271,913,155.71/427,792.54
  6. Step 6: Final answer
    x = 358,285.62

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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.