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Finding the Fourth Proportional to 315,466.50, 472,966.47 and 190,779.78

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Solution

The fourth proportional to 315,466.50, 472,966.47 and 190,779.78 is: 286,028.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,466.50 : 472,966.47 = 190,779.78 : x
  2. Step 2: Convert to fraction form
    315,466.50/472,966.47 = 190,779.78/x
  3. Step 3: Cross multiply
    315,466.50x = 472,966.47 × 190,779.78
  4. Step 4: Simplify right side
    315,466.50x = 90,232,439,093.98
  5. Step 5: Solve for x
    x = 90,232,439,093.98/315,466.50
  6. Step 6: Final answer
    x = 286,028.59

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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.