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Finding the Fourth Proportional to 477,946.60, 716,919.90 and 393,965.80

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Solution

The fourth proportional to 477,946.60, 716,919.90 and 393,965.80 is: 590,948.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    477,946.60 : 716,919.90 = 393,965.80 : x
  2. Step 2: Convert to fraction form
    477,946.60/716,919.90 = 393,965.80/x
  3. Step 3: Cross multiply
    477,946.60x = 716,919.90 × 393,965.80
  4. Step 4: Simplify right side
    477,946.60x = 282,441,921,939.42
  5. Step 5: Solve for x
    x = 282,441,921,939.42/477,946.60
  6. Step 6: Final answer
    x = 590,948.70

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.