Home / 455,139,816.85-627,746,851.17-391,667,139.06

Finding the Fourth Proportional to 455,139,816.85, 627,746,851.17 and 391,667,139.06

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Solution

The fourth proportional to 455,139,816.85, 627,746,851.17 and 391,667,139.06 is: 540,202,821.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,139,816.85 : 627,746,851.17 = 391,667,139.06 : x
  2. Step 2: Convert to fraction form
    455,139,816.85/627,746,851.17 = 391,667,139.06/x
  3. Step 3: Cross multiply
    455,139,816.85x = 627,746,851.17 × 391,667,139.06
  4. Step 4: Simplify right side
    455,139,816.85x = 245,867,813,249,323,424
  5. Step 5: Solve for x
    x = 245,867,813,249,323,424/455,139,816.85
  6. Step 6: Final answer
    x = 540,202,821.52

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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.