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Finding the Fourth Proportional to 710,737.20, 980,802.72 and 388,449.59

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Solution

The fourth proportional to 710,737.20, 980,802.72 and 388,449.59 is: 536,052.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,737.20 : 980,802.72 = 388,449.59 : x
  2. Step 2: Convert to fraction form
    710,737.20/980,802.72 = 388,449.59/x
  3. Step 3: Cross multiply
    710,737.20x = 980,802.72 × 388,449.59
  4. Step 4: Simplify right side
    710,737.20x = 380,992,409,550.87
  5. Step 5: Solve for x
    x = 380,992,409,550.87/710,737.20
  6. Step 6: Final answer
    x = 536,052.44

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1.5x scale

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.