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Finding the Fourth Proportional to 315,749.62, 435,740.76 and 172,518.56

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Solution

The fourth proportional to 315,749.62, 435,740.76 and 172,518.56 is: 238,079.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,749.62 : 435,740.76 = 172,518.56 : x
  2. Step 2: Convert to fraction form
    315,749.62/435,740.76 = 172,518.56/x
  3. Step 3: Cross multiply
    315,749.62x = 435,740.76 × 172,518.56
  4. Step 4: Simplify right side
    315,749.62x = 75,173,368,448.51
  5. Step 5: Solve for x
    x = 75,173,368,448.51/315,749.62
  6. Step 6: Final answer
    x = 238,079.05

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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.