Home / 390,139,106.64-537,871,134.52-309,937,209.44

Finding the Fourth Proportional to 390,139,106.64, 537,871,134.52 and 309,937,209.44

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Solution

The fourth proportional to 390,139,106.64, 537,871,134.52 and 309,937,209.44 is: 427,299,585.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,139,106.64 : 537,871,134.52 = 309,937,209.44 : x
  2. Step 2: Convert to fraction form
    390,139,106.64/537,871,134.52 = 309,937,209.44/x
  3. Step 3: Cross multiply
    390,139,106.64x = 537,871,134.52 × 309,937,209.44
  4. Step 4: Simplify right side
    390,139,106.64x = 166,706,278,471,455,648
  5. Step 5: Solve for x
    x = 166,706,278,471,455,648/390,139,106.64
  6. Step 6: Final answer
    x = 427,299,585.29

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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.