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Finding the Fourth Proportional to 386,970.49, 580,411.95 and 134,204.32

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Solution

The fourth proportional to 386,970.49, 580,411.95 and 134,204.32 is: 201,291.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,970.49 : 580,411.95 = 134,204.32 : x
  2. Step 2: Convert to fraction form
    386,970.49/580,411.95 = 134,204.32/x
  3. Step 3: Cross multiply
    386,970.49x = 580,411.95 × 134,204.32
  4. Step 4: Simplify right side
    386,970.49x = 77,893,791,069.62
  5. Step 5: Solve for x
    x = 77,893,791,069.62/386,970.49
  6. Step 6: Final answer
    x = 201,291.30

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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.