Home / 427,319,643.30-640,979,464.95-422,784,680.10

Finding the Fourth Proportional to 427,319,643.30, 640,979,464.95 and 422,784,680.10

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Solution

The fourth proportional to 427,319,643.30, 640,979,464.95 and 422,784,680.10 is: 634,177,020.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,319,643.30 : 640,979,464.95 = 422,784,680.10 : x
  2. Step 2: Convert to fraction form
    427,319,643.30/640,979,464.95 = 422,784,680.10/x
  3. Step 3: Cross multiply
    427,319,643.30x = 640,979,464.95 × 422,784,680.10
  4. Step 4: Simplify right side
    427,319,643.30x = 270,996,298,039,554,944
  5. Step 5: Solve for x
    x = 270,996,298,039,554,944/427,319,643.30
  6. Step 6: Final answer
    x = 634,177,020.15

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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.