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Finding the Fourth Proportional to 703,468,531.08, 970,903,004.04 and 390,303,635.40

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Solution

The fourth proportional to 703,468,531.08, 970,903,004.04 and 390,303,635.40 is: 538,683,616.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,468,531.08 : 970,903,004.04 = 390,303,635.40 : x
  2. Step 2: Convert to fraction form
    703,468,531.08/970,903,004.04 = 390,303,635.40/x
  3. Step 3: Cross multiply
    703,468,531.08x = 970,903,004.04 × 390,303,635.40
  4. Step 4: Simplify right side
    703,468,531.08x = 378,946,972,097,592,832
  5. Step 5: Solve for x
    x = 378,946,972,097,592,832/703,468,531.08
  6. Step 6: Final answer
    x = 538,683,616.05

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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.