Home / 521,211,086.88-781,643,022.84-210,238,384.80

Finding the Fourth Proportional to 521,211,086.88, 781,643,022.84 and 210,238,384.80

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Solution

The fourth proportional to 521,211,086.88, 781,643,022.84 and 210,238,384.80 is: 315,287,549.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,211,086.88 : 781,643,022.84 = 210,238,384.80 : x
  2. Step 2: Convert to fraction form
    521,211,086.88/781,643,022.84 = 210,238,384.80/x
  3. Step 3: Cross multiply
    521,211,086.88x = 781,643,022.84 × 210,238,384.80
  4. Step 4: Simplify right side
    521,211,086.88x = 164,331,366,612,071,136
  5. Step 5: Solve for x
    x = 164,331,366,612,071,136/521,211,086.88
  6. Step 6: Final answer
    x = 315,287,549.99

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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.