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Finding the Fourth Proportional to 984,628.31, 1,358,503.62 and 640,970.01

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Solution

The fourth proportional to 984,628.31, 1,358,503.62 and 640,970.01 is: 884,354.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    984,628.31 : 1,358,503.62 = 640,970.01 : x
  2. Step 2: Convert to fraction form
    984,628.31/1,358,503.62 = 640,970.01/x
  3. Step 3: Cross multiply
    984,628.31x = 1,358,503.62 × 640,970.01
  4. Step 4: Simplify right side
    984,628.31x = 870,760,078,896.44
  5. Step 5: Solve for x
    x = 870,760,078,896.44/984,628.31
  6. Step 6: Final answer
    x = 884,354.10

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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.