Home / 442,870,911.20-664,495,323.60-212,721,528.80

Finding the Fourth Proportional to 442,870,911.20, 664,495,323.60 and 212,721,528.80

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Solution

The fourth proportional to 442,870,911.20, 664,495,323.60 and 212,721,528.80 is: 319,173,053.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,870,911.20 : 664,495,323.60 = 212,721,528.80 : x
  2. Step 2: Convert to fraction form
    442,870,911.20/664,495,323.60 = 212,721,528.80/x
  3. Step 3: Cross multiply
    442,870,911.20x = 664,495,323.60 × 212,721,528.80
  4. Step 4: Simplify right side
    442,870,911.20x = 141,352,461,116,642,736
  5. Step 5: Solve for x
    x = 141,352,461,116,642,736/442,870,911.20
  6. Step 6: Final answer
    x = 319,173,053.69

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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.