Home / 431,282,942.40-646,483,514.40-212,596,939.20

Finding the Fourth Proportional to 431,282,942.40, 646,483,514.40 and 212,596,939.20

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Solution

The fourth proportional to 431,282,942.40, 646,483,514.40 and 212,596,939.20 is: 318,678,071.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,282,942.40 : 646,483,514.40 = 212,596,939.20 : x
  2. Step 2: Convert to fraction form
    431,282,942.40/646,483,514.40 = 212,596,939.20/x
  3. Step 3: Cross multiply
    431,282,942.40x = 646,483,514.40 × 212,596,939.20
  4. Step 4: Simplify right side
    431,282,942.40x = 137,440,416,404,699,104
  5. Step 5: Solve for x
    x = 137,440,416,404,699,104/431,282,942.40
  6. Step 6: Final answer
    x = 318,678,071.62

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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.