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Finding the Fourth Proportional to 405,125.80, 607,688.70 and 254,878.90

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Solution

The fourth proportional to 405,125.80, 607,688.70 and 254,878.90 is: 382,318.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,125.80 : 607,688.70 = 254,878.90 : x
  2. Step 2: Convert to fraction form
    405,125.80/607,688.70 = 254,878.90/x
  3. Step 3: Cross multiply
    405,125.80x = 607,688.70 × 254,878.90
  4. Step 4: Simplify right side
    405,125.80x = 154,887,027,398.43
  5. Step 5: Solve for x
    x = 154,887,027,398.43/405,125.80
  6. Step 6: Final answer
    x = 382,318.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.