Home / 520,016,069.40-780,024,104.10-213,528,139.80

Finding the Fourth Proportional to 520,016,069.40, 780,024,104.10 and 213,528,139.80

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Solution

The fourth proportional to 520,016,069.40, 780,024,104.10 and 213,528,139.80 is: 320,292,209.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,016,069.40 : 780,024,104.10 = 213,528,139.80 : x
  2. Step 2: Convert to fraction form
    520,016,069.40/780,024,104.10 = 213,528,139.80/x
  3. Step 3: Cross multiply
    520,016,069.40x = 780,024,104.10 × 213,528,139.80
  4. Step 4: Simplify right side
    520,016,069.40x = 166,557,095,947,634,560
  5. Step 5: Solve for x
    x = 166,557,095,947,634,560/520,016,069.40
  6. Step 6: Final answer
    x = 320,292,209.70

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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.