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Finding the Fourth Proportional to 427,798.36, 642,328.36 and 238,628.32

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Solution

The fourth proportional to 427,798.36, 642,328.36 and 238,628.32 is: 358,294.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,798.36 : 642,328.36 = 238,628.32 : x
  2. Step 2: Convert to fraction form
    427,798.36/642,328.36 = 238,628.32/x
  3. Step 3: Cross multiply
    427,798.36x = 642,328.36 × 238,628.32
  4. Step 4: Simplify right side
    427,798.36x = 153,277,737,435.16
  5. Step 5: Solve for x
    x = 153,277,737,435.16/427,798.36
  6. Step 6: Final answer
    x = 358,294.35

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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.