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Finding the Fourth Proportional to 720,566.98, 994,386.39 and 393,880.48

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Solution

The fourth proportional to 720,566.98, 994,386.39 and 393,880.48 is: 543,557.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,566.98 : 994,386.39 = 393,880.48 : x
  2. Step 2: Convert to fraction form
    720,566.98/994,386.39 = 393,880.48/x
  3. Step 3: Cross multiply
    720,566.98x = 994,386.39 × 393,880.48
  4. Step 4: Simplify right side
    720,566.98x = 391,669,388,598.67
  5. Step 5: Solve for x
    x = 391,669,388,598.67/720,566.98
  6. Step 6: Final answer
    x = 543,557.23

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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.