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Finding the Fourth Proportional to 317,655.66, 438,379.11 and 190,328.52

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Solution

The fourth proportional to 317,655.66, 438,379.11 and 190,328.52 is: 262,661.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,655.66 : 438,379.11 = 190,328.52 : x
  2. Step 2: Convert to fraction form
    317,655.66/438,379.11 = 190,328.52/x
  3. Step 3: Cross multiply
    317,655.66x = 438,379.11 × 190,328.52
  4. Step 4: Simplify right side
    317,655.66x = 83,436,047,205.22
  5. Step 5: Solve for x
    x = 83,436,047,205.22/317,655.66
  6. Step 6: Final answer
    x = 262,661.93

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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.