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Finding the Fourth Proportional to 387,465.50, 581,291.40 and 134,709.05

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Solution

The fourth proportional to 387,465.50, 581,291.40 and 134,709.05 is: 202,095.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,465.50 : 581,291.40 = 134,709.05 : x
  2. Step 2: Convert to fraction form
    387,465.50/581,291.40 = 134,709.05/x
  3. Step 3: Cross multiply
    387,465.50x = 581,291.40 × 134,709.05
  4. Step 4: Simplify right side
    387,465.50x = 78,305,212,267.17
  5. Step 5: Solve for x
    x = 78,305,212,267.17/387,465.50
  6. Step 6: Final answer
    x = 202,095.96

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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.