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Finding the Fourth Proportional to 317,516.50, 438,156.90 and 188,460.58

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Solution

The fourth proportional to 317,516.50, 438,156.90 and 188,460.58 is: 260,066.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,516.50 : 438,156.90 = 188,460.58 : x
  2. Step 2: Convert to fraction form
    317,516.50/438,156.90 = 188,460.58/x
  3. Step 3: Cross multiply
    317,516.50x = 438,156.90 × 188,460.58
  4. Step 4: Simplify right side
    317,516.50x = 82,575,303,505.00
  5. Step 5: Solve for x
    x = 82,575,303,505.00/317,516.50
  6. Step 6: Final answer
    x = 260,066.18

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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.