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Finding the Fourth Proportional to 290,018.07, 434,622.51 and 156,611.07

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Solution

The fourth proportional to 290,018.07, 434,622.51 and 156,611.07 is: 234,698.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,018.07 : 434,622.51 = 156,611.07 : x
  2. Step 2: Convert to fraction form
    290,018.07/434,622.51 = 156,611.07/x
  3. Step 3: Cross multiply
    290,018.07x = 434,622.51 × 156,611.07
  4. Step 4: Simplify right side
    290,018.07x = 68,066,696,337.19
  5. Step 5: Solve for x
    x = 68,066,696,337.19/290,018.07
  6. Step 6: Final answer
    x = 234,698.12

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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.