Home / 287,712,845.40-431,569,268.10-164,764,954.20

Finding the Fourth Proportional to 287,712,845.40, 431,569,268.10 and 164,764,954.20

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Solution

The fourth proportional to 287,712,845.40, 431,569,268.10 and 164,764,954.20 is: 247,147,431.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,712,845.40 : 431,569,268.10 = 164,764,954.20 : x
  2. Step 2: Convert to fraction form
    287,712,845.40/431,569,268.10 = 164,764,954.20/x
  3. Step 3: Cross multiply
    287,712,845.40x = 431,569,268.10 × 164,764,954.20
  4. Step 4: Simplify right side
    287,712,845.40x = 71,107,490,692,624,016
  5. Step 5: Solve for x
    x = 71,107,490,692,624,016/287,712,845.40
  6. Step 6: Final answer
    x = 247,147,431.30

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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.