Home / 720,465,450.39-994,243,171.59-390,440,589.39

Finding the Fourth Proportional to 720,465,450.39, 994,243,171.59 and 390,440,589.39

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Solution

The fourth proportional to 720,465,450.39, 994,243,171.59 and 390,440,589.39 is: 538,808,474.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,465,450.39 : 994,243,171.59 = 390,440,589.39 : x
  2. Step 2: Convert to fraction form
    720,465,450.39/994,243,171.59 = 390,440,589.39/x
  3. Step 3: Cross multiply
    720,465,450.39x = 994,243,171.59 × 390,440,589.39
  4. Step 4: Simplify right side
    720,465,450.39x = 388,192,889,912,582,528
  5. Step 5: Solve for x
    x = 388,192,889,912,582,528/720,465,450.39
  6. Step 6: Final answer
    x = 538,808,474.03

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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.