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Finding the Fourth Proportional to 477,945.60, 716,918.40 and 393,964.80

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Solution

The fourth proportional to 477,945.60, 716,918.40 and 393,964.80 is: 590,947.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    477,945.60 : 716,918.40 = 393,964.80 : x
  2. Step 2: Convert to fraction form
    477,945.60/716,918.40 = 393,964.80/x
  3. Step 3: Cross multiply
    477,945.60x = 716,918.40 × 393,964.80
  4. Step 4: Simplify right side
    477,945.60x = 282,440,614,072.32
  5. Step 5: Solve for x
    x = 282,440,614,072.32/477,945.60
  6. Step 6: Final answer
    x = 590,947.20

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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.