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Finding the Fourth Proportional to 208,308.93, 287,387.06 and 153,991.51

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Solution

The fourth proportional to 208,308.93, 287,387.06 and 153,991.51 is: 212,449.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,308.93 : 287,387.06 = 153,991.51 : x
  2. Step 2: Convert to fraction form
    208,308.93/287,387.06 = 153,991.51/x
  3. Step 3: Cross multiply
    208,308.93x = 287,387.06 × 153,991.51
  4. Step 4: Simplify right side
    208,308.93x = 44,255,168,318.19
  5. Step 5: Solve for x
    x = 44,255,168,318.19/208,308.93
  6. Step 6: Final answer
    x = 212,449.69

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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.