Home / 520,016,006.90-780,024,010.35-213,528,077.30

Finding the Fourth Proportional to 520,016,006.90, 780,024,010.35 and 213,528,077.30

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Solution

The fourth proportional to 520,016,006.90, 780,024,010.35 and 213,528,077.30 is: 320,292,115.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,016,006.90 : 780,024,010.35 = 213,528,077.30 : x
  2. Step 2: Convert to fraction form
    520,016,006.90/780,024,010.35 = 213,528,077.30/x
  3. Step 3: Cross multiply
    520,016,006.90x = 780,024,010.35 × 213,528,077.30
  4. Step 4: Simplify right side
    520,016,006.90x = 166,557,027,177,870,816
  5. Step 5: Solve for x
    x = 166,557,027,177,870,816/520,016,006.90
  6. Step 6: Final answer
    x = 320,292,115.95

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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.