Home / 520,946,656.80-780,748,138.80-399,174,496.80

Finding the Fourth Proportional to 520,946,656.80, 780,748,138.80 and 399,174,496.80

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Solution

The fourth proportional to 520,946,656.80, 780,748,138.80 and 399,174,496.80 is: 598,246,944.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,946,656.80 : 780,748,138.80 = 399,174,496.80 : x
  2. Step 2: Convert to fraction form
    520,946,656.80/780,748,138.80 = 399,174,496.80/x
  3. Step 3: Cross multiply
    520,946,656.80x = 780,748,138.80 × 399,174,496.80
  4. Step 4: Simplify right side
    520,946,656.80x = 311,654,745,433,026,560
  5. Step 5: Solve for x
    x = 311,654,745,433,026,560/520,946,656.80
  6. Step 6: Final answer
    x = 598,246,944.03

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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.