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Finding the Fourth Proportional to 292,690.40, 438,720.62 and 191,450.32

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Solution

The fourth proportional to 292,690.40, 438,720.62 and 191,450.32 is: 286,969.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,690.40 : 438,720.62 = 191,450.32 : x
  2. Step 2: Convert to fraction form
    292,690.40/438,720.62 = 191,450.32/x
  3. Step 3: Cross multiply
    292,690.40x = 438,720.62 × 191,450.32
  4. Step 4: Simplify right side
    292,690.40x = 83,993,200,896.00
  5. Step 5: Solve for x
    x = 83,993,200,896.00/292,690.40
  6. Step 6: Final answer
    x = 286,969.45

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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.