Home / 656,836.81-906,280.26-398,707.40

Finding the Fourth Proportional to 656,836.81, 906,280.26 and 398,707.40

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Solution

The fourth proportional to 656,836.81, 906,280.26 and 398,707.40 is: 550,122.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,836.81 : 906,280.26 = 398,707.40 : x
  2. Step 2: Convert to fraction form
    656,836.81/906,280.26 = 398,707.40/x
  3. Step 3: Cross multiply
    656,836.81x = 906,280.26 × 398,707.40
  4. Step 4: Simplify right side
    656,836.81x = 361,340,646,135.92
  5. Step 5: Solve for x
    x = 361,340,646,135.92/656,836.81
  6. Step 6: Final answer
    x = 550,122.41

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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.