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Finding the Fourth Proportional to 621,158,863.80, 931,738,295.70 and 477,831,631.80

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Solution

The fourth proportional to 621,158,863.80, 931,738,295.70 and 477,831,631.80 is: 716,747,447.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,158,863.80 : 931,738,295.70 = 477,831,631.80 : x
  2. Step 2: Convert to fraction form
    621,158,863.80/931,738,295.70 = 477,831,631.80/x
  3. Step 3: Cross multiply
    621,158,863.80x = 931,738,295.70 × 477,831,631.80
  4. Step 4: Simplify right side
    621,158,863.80x = 445,214,030,244,881,984
  5. Step 5: Solve for x
    x = 445,214,030,244,881,984/621,158,863.80
  6. Step 6: Final answer
    x = 716,747,447.70

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Double scale
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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.