Home / 431,080,898.40-646,621,347.60-212,835,794.40

Finding the Fourth Proportional to 431,080,898.40, 646,621,347.60 and 212,835,794.40

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Solution

The fourth proportional to 431,080,898.40, 646,621,347.60 and 212,835,794.40 is: 319,253,691.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,080,898.40 : 646,621,347.60 = 212,835,794.40 : x
  2. Step 2: Convert to fraction form
    431,080,898.40/646,621,347.60 = 212,835,794.40/x
  3. Step 3: Cross multiply
    431,080,898.40x = 646,621,347.60 × 212,835,794.40
  4. Step 4: Simplify right side
    431,080,898.40x = 137,624,168,192,444,544
  5. Step 5: Solve for x
    x = 137,624,168,192,444,544/431,080,898.40
  6. Step 6: Final answer
    x = 319,253,691.60

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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.