Home / 390,139,110.64-537,871,140.04-309,937,213.44

Finding the Fourth Proportional to 390,139,110.64, 537,871,140.04 and 309,937,213.44

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Solution

The fourth proportional to 390,139,110.64, 537,871,140.04 and 309,937,213.44 is: 427,299,590.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,139,110.64 : 537,871,140.04 = 309,937,213.44 : x
  2. Step 2: Convert to fraction form
    390,139,110.64/537,871,140.04 = 309,937,213.44/x
  3. Step 3: Cross multiply
    390,139,110.64x = 537,871,140.04 × 309,937,213.44
  4. Step 4: Simplify right side
    390,139,110.64x = 166,706,282,333,793,600
  5. Step 5: Solve for x
    x = 166,706,282,333,793,600/390,139,110.64
  6. Step 6: Final answer
    x = 427,299,590.81

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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.