Home / 738,900.78-1,019,683.23-399,367.98

Finding the Fourth Proportional to 738,900.78, 1,019,683.23 and 399,367.98

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Solution

The fourth proportional to 738,900.78, 1,019,683.23 and 399,367.98 is: 551,127.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,900.78 : 1,019,683.23 = 399,367.98 : x
  2. Step 2: Convert to fraction form
    738,900.78/1,019,683.23 = 399,367.98/x
  3. Step 3: Cross multiply
    738,900.78x = 1,019,683.23 × 399,367.98
  4. Step 4: Simplify right side
    738,900.78x = 407,228,831,804.98
  5. Step 5: Solve for x
    x = 407,228,831,804.98/738,900.78
  6. Step 6: Final answer
    x = 551,127.90

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Double scale
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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.