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Finding the Fourth Proportional to 922,573.72, 1,383,959.04 and 390,148.57

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Solution

The fourth proportional to 922,573.72, 1,383,959.04 and 390,148.57 is: 585,264.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,573.72 : 1,383,959.04 = 390,148.57 : x
  2. Step 2: Convert to fraction form
    922,573.72/1,383,959.04 = 390,148.57/x
  3. Step 3: Cross multiply
    922,573.72x = 1,383,959.04 × 390,148.57
  4. Step 4: Simplify right side
    922,573.72x = 539,949,640,394.57
  5. Step 5: Solve for x
    x = 539,949,640,394.57/922,573.72
  6. Step 6: Final answer
    x = 585,264.49

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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.