Home / 431,154,005.80-646,825,487.10-212,908,901.80

Finding the Fourth Proportional to 431,154,005.80, 646,825,487.10 and 212,908,901.80

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Solution

The fourth proportional to 431,154,005.80, 646,825,487.10 and 212,908,901.80 is: 319,410,007.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,154,005.80 : 646,825,487.10 = 212,908,901.80 : x
  2. Step 2: Convert to fraction form
    431,154,005.80/646,825,487.10 = 212,908,901.80/x
  3. Step 3: Cross multiply
    431,154,005.80x = 646,825,487.10 × 212,908,901.80
  4. Step 4: Simplify right side
    431,154,005.80x = 137,714,904,114,711,072
  5. Step 5: Solve for x
    x = 137,714,904,114,711,072/431,154,005.80
  6. Step 6: Final answer
    x = 319,410,007.24

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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.