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Finding the Fourth Proportional to 413,952,048.40, 620,840,981.40 and 209,287,728.40

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Solution

The fourth proportional to 413,952,048.40, 620,840,981.40 and 209,287,728.40 is: 313,887,560.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,952,048.40 : 620,840,981.40 = 209,287,728.40 : x
  2. Step 2: Convert to fraction form
    413,952,048.40/620,840,981.40 = 209,287,728.40/x
  3. Step 3: Cross multiply
    413,952,048.40x = 620,840,981.40 × 209,287,728.40
  4. Step 4: Simplify right side
    413,952,048.40x = 129,934,398,694,832,656
  5. Step 5: Solve for x
    x = 129,934,398,694,832,656/413,952,048.40
  6. Step 6: Final answer
    x = 313,887,560.64

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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.