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Finding the Fourth Proportional to 387,511.40, 580,878.30 and 177,300.20

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Solution

The fourth proportional to 387,511.40, 580,878.30 and 177,300.20 is: 265,772.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,511.40 : 580,878.30 = 177,300.20 : x
  2. Step 2: Convert to fraction form
    387,511.40/580,878.30 = 177,300.20/x
  3. Step 3: Cross multiply
    387,511.40x = 580,878.30 × 177,300.20
  4. Step 4: Simplify right side
    387,511.40x = 102,989,838,765.66
  5. Step 5: Solve for x
    x = 102,989,838,765.66/387,511.40
  6. Step 6: Final answer
    x = 265,772.41

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1.5x scale

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.