Home / 520,015,972.40-780,023,958.60-213,528,042.80

Finding the Fourth Proportional to 520,015,972.40, 780,023,958.60 and 213,528,042.80

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Solution

The fourth proportional to 520,015,972.40, 780,023,958.60 and 213,528,042.80 is: 320,292,064.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,015,972.40 : 780,023,958.60 = 213,528,042.80 : x
  2. Step 2: Convert to fraction form
    520,015,972.40/780,023,958.60 = 213,528,042.80/x
  3. Step 3: Cross multiply
    520,015,972.40x = 780,023,958.60 × 213,528,042.80
  4. Step 4: Simplify right side
    520,015,972.40x = 166,556,989,216,966,240
  5. Step 5: Solve for x
    x = 166,556,989,216,966,240/520,015,972.40
  6. Step 6: Final answer
    x = 320,292,064.20

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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.