Home / 687,961,877.28-949,329,072.45-386,523,588.66

Finding the Fourth Proportional to 687,961,877.28, 949,329,072.45 and 386,523,588.66

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Solution

The fourth proportional to 687,961,877.28, 949,329,072.45 and 386,523,588.66 is: 533,369,786.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,961,877.28 : 949,329,072.45 = 386,523,588.66 : x
  2. Step 2: Convert to fraction form
    687,961,877.28/949,329,072.45 = 386,523,588.66/x
  3. Step 3: Cross multiply
    687,961,877.28x = 949,329,072.45 × 386,523,588.66
  4. Step 4: Simplify right side
    687,961,877.28x = 366,938,079,902,643,200
  5. Step 5: Solve for x
    x = 366,938,079,902,643,200/687,961,877.28
  6. Step 6: Final answer
    x = 533,369,786.93

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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.