Home / 720,465,443.64-994,243,162.41-390,440,582.64

Finding the Fourth Proportional to 720,465,443.64, 994,243,162.41 and 390,440,582.64

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Solution

The fourth proportional to 720,465,443.64, 994,243,162.41 and 390,440,582.64 is: 538,808,464.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,465,443.64 : 994,243,162.41 = 390,440,582.64 : x
  2. Step 2: Convert to fraction form
    720,465,443.64/994,243,162.41 = 390,440,582.64/x
  3. Step 3: Cross multiply
    720,465,443.64x = 994,243,162.41 × 390,440,582.64
  4. Step 4: Simplify right side
    720,465,443.64x = 388,192,879,617,196,544
  5. Step 5: Solve for x
    x = 388,192,879,617,196,544/720,465,443.64
  6. Step 6: Final answer
    x = 538,808,464.78

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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.