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Finding the Fourth Proportional to 318,059.51, 438,925.59 and 172,865.39

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Solution

The fourth proportional to 318,059.51, 438,925.59 and 172,865.39 is: 238,556.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,059.51 : 438,925.59 = 172,865.39 : x
  2. Step 2: Convert to fraction form
    318,059.51/438,925.59 = 172,865.39/x
  3. Step 3: Cross multiply
    318,059.51x = 438,925.59 × 172,865.39
  4. Step 4: Simplify right side
    318,059.51x = 75,875,041,101.70
  5. Step 5: Solve for x
    x = 75,875,041,101.70/318,059.51
  6. Step 6: Final answer
    x = 238,556.12

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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.