Home / 639,712,773.28-882,862,802.08-388,759,247.20

Finding the Fourth Proportional to 639,712,773.28, 882,862,802.08 and 388,759,247.20

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Solution

The fourth proportional to 639,712,773.28, 882,862,802.08 and 388,759,247.20 is: 536,523,722.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,712,773.28 : 882,862,802.08 = 388,759,247.20 : x
  2. Step 2: Convert to fraction form
    639,712,773.28/882,862,802.08 = 388,759,247.20/x
  3. Step 3: Cross multiply
    639,712,773.28x = 882,862,802.08 × 388,759,247.20
  4. Step 4: Simplify right side
    639,712,773.28x = 343,221,078,317,503,424
  5. Step 5: Solve for x
    x = 343,221,078,317,503,424/639,712,773.28
  6. Step 6: Final answer
    x = 536,523,722.29

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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.