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Finding the Fourth Proportional to 626,685, 864,826.38 and 358,413

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Solution

The fourth proportional to 626,685, 864,826.38 and 358,413 is: 494,610.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,685 : 864,826.38 = 358,413 : x
  2. Step 2: Convert to fraction form
    626,685/864,826.38 = 358,413/x
  3. Step 3: Cross multiply
    626,685x = 864,826.38 × 358,413
  4. Step 4: Simplify right side
    626,685x = 309,965,017,334.94
  5. Step 5: Solve for x
    x = 309,965,017,334.94/626,685
  6. Step 6: Final answer
    x = 494,610.56

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1.5x scale

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.