Home / 388,337,066.53-535,905,131.21-209,720,939.83

Finding the Fourth Proportional to 388,337,066.53, 535,905,131.21 and 209,720,939.83

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Solution

The fourth proportional to 388,337,066.53, 535,905,131.21 and 209,720,939.83 is: 289,414,885.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,337,066.53 : 535,905,131.21 = 209,720,939.83 : x
  2. Step 2: Convert to fraction form
    388,337,066.53/535,905,131.21 = 209,720,939.83/x
  3. Step 3: Cross multiply
    388,337,066.53x = 535,905,131.21 × 209,720,939.83
  4. Step 4: Simplify right side
    388,337,066.53x = 112,390,527,776,032,064
  5. Step 5: Solve for x
    x = 112,390,527,776,032,064/388,337,066.53
  6. Step 6: Final answer
    x = 289,414,885.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.