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Finding the Fourth Proportional to 315,896.90, 473,775.68 and 91,208.50

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Solution

The fourth proportional to 315,896.90, 473,775.68 and 91,208.50 is: 136,792.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,896.90 : 473,775.68 = 91,208.50 : x
  2. Step 2: Convert to fraction form
    315,896.90/473,775.68 = 91,208.50/x
  3. Step 3: Cross multiply
    315,896.90x = 473,775.68 × 91,208.50
  4. Step 4: Simplify right side
    315,896.90x = 43,212,368,152.86
  5. Step 5: Solve for x
    x = 43,212,368,152.86/315,896.90
  6. Step 6: Final answer
    x = 136,792.63

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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.