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Finding the Fourth Proportional to 315,687.40, 473,012.70 and 262,810.60

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Solution

The fourth proportional to 315,687.40, 473,012.70 and 262,810.60 is: 393,784.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,687.40 : 473,012.70 = 262,810.60 : x
  2. Step 2: Convert to fraction form
    315,687.40/473,012.70 = 262,810.60/x
  3. Step 3: Cross multiply
    315,687.40x = 473,012.70 × 262,810.60
  4. Step 4: Simplify right side
    315,687.40x = 124,312,751,494.62
  5. Step 5: Solve for x
    x = 124,312,751,494.62/315,687.40
  6. Step 6: Final answer
    x = 393,784.33

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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.