Home / 678,294.43-1,016,111.48-393,386.45

Finding the Fourth Proportional to 678,294.43, 1,016,111.48 and 393,386.45

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Solution

The fourth proportional to 678,294.43, 1,016,111.48 and 393,386.45 is: 589,308.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,294.43 : 1,016,111.48 = 393,386.45 : x
  2. Step 2: Convert to fraction form
    678,294.43/1,016,111.48 = 393,386.45/x
  3. Step 3: Cross multiply
    678,294.43x = 1,016,111.48 × 393,386.45
  4. Step 4: Simplify right side
    678,294.43x = 399,724,480,873.96
  5. Step 5: Solve for x
    x = 399,724,480,873.96/678,294.43
  6. Step 6: Final answer
    x = 589,308.22

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Double scale
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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.