Home / 287,998.20-397,586.95-210,386.70

Finding the Fourth Proportional to 287,998.20, 397,586.95 and 210,386.70

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Solution

The fourth proportional to 287,998.20, 397,586.95 and 210,386.70 is: 290,442.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,998.20 : 397,586.95 = 210,386.70 : x
  2. Step 2: Convert to fraction form
    287,998.20/397,586.95 = 210,386.70/x
  3. Step 3: Cross multiply
    287,998.20x = 397,586.95 × 210,386.70
  4. Step 4: Simplify right side
    287,998.20x = 83,647,005,847.60
  5. Step 5: Solve for x
    x = 83,647,005,847.60/287,998.20
  6. Step 6: Final answer
    x = 290,442.81

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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.