Home / 520,016,006.40-780,024,009.60-213,528,076.80

Finding the Fourth Proportional to 520,016,006.40, 780,024,009.60 and 213,528,076.80

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Solution

The fourth proportional to 520,016,006.40, 780,024,009.60 and 213,528,076.80 is: 320,292,115.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,016,006.40 : 780,024,009.60 = 213,528,076.80 : x
  2. Step 2: Convert to fraction form
    520,016,006.40/780,024,009.60 = 213,528,076.80/x
  3. Step 3: Cross multiply
    520,016,006.40x = 780,024,009.60 × 213,528,076.80
  4. Step 4: Simplify right side
    520,016,006.40x = 166,557,026,627,712,736
  5. Step 5: Solve for x
    x = 166,557,026,627,712,736/520,016,006.40
  6. Step 6: Final answer
    x = 320,292,115.20

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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.