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Finding the Fourth Proportional to 208,420.40, 287,620.40 and 112,927.08

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Solution

The fourth proportional to 208,420.40, 287,620.40 and 112,927.08 is: 155,839.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,420.40 : 287,620.40 = 112,927.08 : x
  2. Step 2: Convert to fraction form
    208,420.40/287,620.40 = 112,927.08/x
  3. Step 3: Cross multiply
    208,420.40x = 287,620.40 × 112,927.08
  4. Step 4: Simplify right side
    208,420.40x = 32,480,131,920.43
  5. Step 5: Solve for x
    x = 32,480,131,920.43/208,420.40
  6. Step 6: Final answer
    x = 155,839.50

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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.