Home / 720,465,448.30-994,243,168.92-390,440,587.30

Finding the Fourth Proportional to 720,465,448.30, 994,243,168.92 and 390,440,587.30

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Solution

The fourth proportional to 720,465,448.30, 994,243,168.92 and 390,440,587.30 is: 538,808,471.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,465,448.30 : 994,243,168.92 = 390,440,587.30 : x
  2. Step 2: Convert to fraction form
    720,465,448.30/994,243,168.92 = 390,440,587.30/x
  3. Step 3: Cross multiply
    720,465,448.30x = 994,243,168.92 × 390,440,587.30
  4. Step 4: Simplify right side
    720,465,448.30x = 388,192,886,792,137,920
  5. Step 5: Solve for x
    x = 388,192,886,792,137,920/720,465,448.30
  6. Step 6: Final answer
    x = 538,808,471.26

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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.