Home / 520,015,930.90-780,023,896.35-213,528,001.30

Finding the Fourth Proportional to 520,015,930.90, 780,023,896.35 and 213,528,001.30

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Solution

The fourth proportional to 520,015,930.90, 780,023,896.35 and 213,528,001.30 is: 320,292,001.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,015,930.90 : 780,023,896.35 = 213,528,001.30 : x
  2. Step 2: Convert to fraction form
    520,015,930.90/780,023,896.35 = 213,528,001.30/x
  3. Step 3: Cross multiply
    520,015,930.90x = 780,023,896.35 × 213,528,001.30
  4. Step 4: Simplify right side
    520,015,930.90x = 166,556,943,553,853,888
  5. Step 5: Solve for x
    x = 166,556,943,553,853,888/520,015,930.90
  6. Step 6: Final answer
    x = 320,292,001.95

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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.