Home / 647,686,530.81-971,529,008.89-210,986,502.03

Finding the Fourth Proportional to 647,686,530.81, 971,529,008.89 and 210,986,502.03

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Solution

The fourth proportional to 647,686,530.81, 971,529,008.89 and 210,986,502.03 is: 316,479,496.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,686,530.81 : 971,529,008.89 = 210,986,502.03 : x
  2. Step 2: Convert to fraction form
    647,686,530.81/971,529,008.89 = 210,986,502.03/x
  3. Step 3: Cross multiply
    647,686,530.81x = 971,529,008.89 × 210,986,502.03
  4. Step 4: Simplify right side
    647,686,530.81x = 204,979,507,207,420,384
  5. Step 5: Solve for x
    x = 204,979,507,207,420,384/647,686,530.81
  6. Step 6: Final answer
    x = 316,479,496.57

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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.