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Finding the Fourth Proportional to 704,844.05, 972,670.28 and 398,914.94

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Solution

The fourth proportional to 704,844.05, 972,670.28 and 398,914.94 is: 550,494.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,844.05 : 972,670.28 = 398,914.94 : x
  2. Step 2: Convert to fraction form
    704,844.05/972,670.28 = 398,914.94/x
  3. Step 3: Cross multiply
    704,844.05x = 972,670.28 × 398,914.94
  4. Step 4: Simplify right side
    704,844.05x = 388,012,706,823.08
  5. Step 5: Solve for x
    x = 388,012,706,823.08/704,844.05
  6. Step 6: Final answer
    x = 550,494.41

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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.