Home / 390,957,510.33-585,642,646.94-304,339,713.21

Finding the Fourth Proportional to 390,957,510.33, 585,642,646.94 and 304,339,713.21

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Solution

The fourth proportional to 390,957,510.33, 585,642,646.94 and 304,339,713.21 is: 455,891,779.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,957,510.33 : 585,642,646.94 = 304,339,713.21 : x
  2. Step 2: Convert to fraction form
    390,957,510.33/585,642,646.94 = 304,339,713.21/x
  3. Step 3: Cross multiply
    390,957,510.33x = 585,642,646.94 × 304,339,713.21
  4. Step 4: Simplify right side
    390,957,510.33x = 178,234,315,211,743,168
  5. Step 5: Solve for x
    x = 178,234,315,211,743,168/390,957,510.33
  6. Step 6: Final answer
    x = 455,891,779.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.