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Finding the Fourth Proportional to 500,612.58, 690,894.90 and 285,784.92

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Solution

The fourth proportional to 500,612.58, 690,894.90 and 285,784.92 is: 394,411.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,612.58 : 690,894.90 = 285,784.92 : x
  2. Step 2: Convert to fraction form
    500,612.58/690,894.90 = 285,784.92/x
  3. Step 3: Cross multiply
    500,612.58x = 690,894.90 × 285,784.92
  4. Step 4: Simplify right side
    500,612.58x = 197,447,343,724.91
  5. Step 5: Solve for x
    x = 197,447,343,724.91/500,612.58
  6. Step 6: Final answer
    x = 394,411.47

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Double scale
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Similar ratio
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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.