Home / 431,282,940.40-646,483,511.40-212,596,937.20

Finding the Fourth Proportional to 431,282,940.40, 646,483,511.40 and 212,596,937.20

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Solution

The fourth proportional to 431,282,940.40, 646,483,511.40 and 212,596,937.20 is: 318,678,068.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,282,940.40 : 646,483,511.40 = 212,596,937.20 : x
  2. Step 2: Convert to fraction form
    431,282,940.40/646,483,511.40 = 212,596,937.20/x
  3. Step 3: Cross multiply
    431,282,940.40x = 646,483,511.40 × 212,596,937.20
  4. Step 4: Simplify right side
    431,282,940.40x = 137,440,414,473,941,264
  5. Step 5: Solve for x
    x = 137,440,414,473,941,264/431,282,940.40
  6. Step 6: Final answer
    x = 318,678,068.62

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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.