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Finding the Fourth Proportional to 611,085.42, 843,285.20 and 339,137.51

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Solution

The fourth proportional to 611,085.42, 843,285.20 and 339,137.51 is: 468,002.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,085.42 : 843,285.20 = 339,137.51 : x
  2. Step 2: Convert to fraction form
    611,085.42/843,285.20 = 339,137.51/x
  3. Step 3: Cross multiply
    611,085.42x = 843,285.20 × 339,137.51
  4. Step 4: Simplify right side
    611,085.42x = 285,989,637,035.74
  5. Step 5: Solve for x
    x = 285,989,637,035.74/611,085.42
  6. Step 6: Final answer
    x = 468,002.72

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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.