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Finding the Fourth Proportional to 315,948.96, 436,020.16 and 172,705.92

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Solution

The fourth proportional to 315,948.96, 436,020.16 and 172,705.92 is: 238,339.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,948.96 : 436,020.16 = 172,705.92 : x
  2. Step 2: Convert to fraction form
    315,948.96/436,020.16 = 172,705.92/x
  3. Step 3: Cross multiply
    315,948.96x = 436,020.16 × 172,705.92
  4. Step 4: Simplify right side
    315,948.96x = 75,303,262,871.35
  5. Step 5: Solve for x
    x = 75,303,262,871.35/315,948.96
  6. Step 6: Final answer
    x = 238,339.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.