Home / 390,139,088.85-537,871,109.97-309,937,191.62

Finding the Fourth Proportional to 390,139,088.85, 537,871,109.97 and 309,937,191.62

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Solution

The fourth proportional to 390,139,088.85, 537,871,109.97 and 309,937,191.62 is: 427,299,560.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,139,088.85 : 537,871,109.97 = 309,937,191.62 : x
  2. Step 2: Convert to fraction form
    390,139,088.85/537,871,109.97 = 309,937,191.62/x
  3. Step 3: Cross multiply
    390,139,088.85x = 537,871,109.97 × 309,937,191.62
  4. Step 4: Simplify right side
    390,139,088.85x = 166,706,261,274,944,640
  5. Step 5: Solve for x
    x = 166,706,261,274,944,640/390,139,088.85
  6. Step 6: Final answer
    x = 427,299,560.69

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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.