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Finding the Fourth Proportional to 392,207,260.40, 587,249,207.40 and 307,272,604.40

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Solution

The fourth proportional to 392,207,260.40, 587,249,207.40 and 307,272,604.40 is: 460,077,136.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,207,260.40 : 587,249,207.40 = 307,272,604.40 : x
  2. Step 2: Convert to fraction form
    392,207,260.40/587,249,207.40 = 307,272,604.40/x
  3. Step 3: Cross multiply
    392,207,260.40x = 587,249,207.40 × 307,272,604.40
  4. Step 4: Simplify right side
    392,207,260.40x = 180,445,593,389,633,728
  5. Step 5: Solve for x
    x = 180,445,593,389,633,728/392,207,260.40
  6. Step 6: Final answer
    x = 460,077,136.78

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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.