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Finding the Fourth Proportional to 524,930,659.20, 787,395,988.80 and 218,820,643.20

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Solution

The fourth proportional to 524,930,659.20, 787,395,988.80 and 218,820,643.20 is: 328,230,964.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    524,930,659.20 : 787,395,988.80 = 218,820,643.20 : x
  2. Step 2: Convert to fraction form
    524,930,659.20/787,395,988.80 = 218,820,643.20/x
  3. Step 3: Cross multiply
    524,930,659.20x = 787,395,988.80 × 218,820,643.20
  4. Step 4: Simplify right side
    524,930,659.20x = 172,298,496,722,315,968
  5. Step 5: Solve for x
    x = 172,298,496,722,315,968/524,930,659.20
  6. Step 6: Final answer
    x = 328,230,964.80

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1.5x scale

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.