Home / 520,015,986.40-780,023,979.60-213,528,056.80

Finding the Fourth Proportional to 520,015,986.40, 780,023,979.60 and 213,528,056.80

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Solution

The fourth proportional to 520,015,986.40, 780,023,979.60 and 213,528,056.80 is: 320,292,085.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,015,986.40 : 780,023,979.60 = 213,528,056.80 : x
  2. Step 2: Convert to fraction form
    520,015,986.40/780,023,979.60 = 213,528,056.80/x
  3. Step 3: Cross multiply
    520,015,986.40x = 780,023,979.60 × 213,528,056.80
  4. Step 4: Simplify right side
    520,015,986.40x = 166,557,004,621,390,848
  5. Step 5: Solve for x
    x = 166,557,004,621,390,848/520,015,986.40
  6. Step 6: Final answer
    x = 320,292,085.20

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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.