Home / 390,139,087.34-537,871,107.90-309,937,190.11

Finding the Fourth Proportional to 390,139,087.34, 537,871,107.90 and 309,937,190.11

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Solution

The fourth proportional to 390,139,087.34, 537,871,107.90 and 309,937,190.11 is: 427,299,558.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,139,087.34 : 537,871,107.90 = 309,937,190.11 : x
  2. Step 2: Convert to fraction form
    390,139,087.34/537,871,107.90 = 309,937,190.11/x
  3. Step 3: Cross multiply
    390,139,087.34x = 537,871,107.90 × 309,937,190.11
  4. Step 4: Simplify right side
    390,139,087.34x = 166,706,259,824,974,112
  5. Step 5: Solve for x
    x = 166,706,259,824,974,112/390,139,087.34
  6. Step 6: Final answer
    x = 427,299,558.63

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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.