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Finding the Fourth Proportional to 638,673,033.40, 958,009,550.10 and 434,599,689.40

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Solution

The fourth proportional to 638,673,033.40, 958,009,550.10 and 434,599,689.40 is: 651,899,534.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,673,033.40 : 958,009,550.10 = 434,599,689.40 : x
  2. Step 2: Convert to fraction form
    638,673,033.40/958,009,550.10 = 434,599,689.40/x
  3. Step 3: Cross multiply
    638,673,033.40x = 958,009,550.10 × 434,599,689.40
  4. Step 4: Simplify right side
    638,673,033.40x = 416,350,652,915,693,696
  5. Step 5: Solve for x
    x = 416,350,652,915,693,696/638,673,033.40
  6. Step 6: Final answer
    x = 651,899,534.10

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1.5x scale

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.