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Finding the Fourth Proportional to 317,812.65, 476,602.11 and 128,222.31

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Solution

The fourth proportional to 317,812.65, 476,602.11 and 128,222.31 is: 192,286.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,812.65 : 476,602.11 = 128,222.31 : x
  2. Step 2: Convert to fraction form
    317,812.65/476,602.11 = 128,222.31/x
  3. Step 3: Cross multiply
    317,812.65x = 476,602.11 × 128,222.31
  4. Step 4: Simplify right side
    317,812.65x = 61,111,023,495.07
  5. Step 5: Solve for x
    x = 61,111,023,495.07/317,812.65
  6. Step 6: Final answer
    x = 192,286.32

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1.5x scale

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.