Home / 690,805,268.40-953,309,719.08-393,447,490.32

Finding the Fourth Proportional to 690,805,268.40, 953,309,719.08 and 393,447,490.32

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Solution

The fourth proportional to 690,805,268.40, 953,309,719.08 and 393,447,490.32 is: 542,956,653.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,805,268.40 : 953,309,719.08 = 393,447,490.32 : x
  2. Step 2: Convert to fraction form
    690,805,268.40/953,309,719.08 = 393,447,490.32/x
  3. Step 3: Cross multiply
    690,805,268.40x = 953,309,719.08 × 393,447,490.32
  4. Step 4: Simplify right side
    690,805,268.40x = 375,077,316,469,690,240
  5. Step 5: Solve for x
    x = 375,077,316,469,690,240/690,805,268.40
  6. Step 6: Final answer
    x = 542,956,653.09

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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.