Home / 390,616,300.80-586,022,428.80-172,308,211.20

Finding the Fourth Proportional to 390,616,300.80, 586,022,428.80 and 172,308,211.20

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Solution

The fourth proportional to 390,616,300.80, 586,022,428.80 and 172,308,211.20 is: 258,505,536.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,616,300.80 : 586,022,428.80 = 172,308,211.20 : x
  2. Step 2: Convert to fraction form
    390,616,300.80/586,022,428.80 = 172,308,211.20/x
  3. Step 3: Cross multiply
    390,616,300.80x = 586,022,428.80 × 172,308,211.20
  4. Step 4: Simplify right side
    390,616,300.80x = 100,976,476,429,607,344
  5. Step 5: Solve for x
    x = 100,976,476,429,607,344/390,616,300.80
  6. Step 6: Final answer
    x = 258,505,536.57

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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.