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Finding the Fourth Proportional to 664,852,744.80, 997,279,117.20 and 389,353,730.40

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Solution

The fourth proportional to 664,852,744.80, 997,279,117.20 and 389,353,730.40 is: 584,030,595.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,852,744.80 : 997,279,117.20 = 389,353,730.40 : x
  2. Step 2: Convert to fraction form
    664,852,744.80/997,279,117.20 = 389,353,730.40/x
  3. Step 3: Cross multiply
    664,852,744.80x = 997,279,117.20 × 389,353,730.40
  4. Step 4: Simplify right side
    664,852,744.80x = 388,294,344,531,838,784
  5. Step 5: Solve for x
    x = 388,294,344,531,838,784/664,852,744.80
  6. Step 6: Final answer
    x = 584,030,595.60

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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.