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Finding the Fourth Proportional to 704,993.41, 972,896.62 and 390,670.50

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Solution

The fourth proportional to 704,993.41, 972,896.62 and 390,670.50 is: 539,128.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,993.41 : 972,896.62 = 390,670.50 : x
  2. Step 2: Convert to fraction form
    704,993.41/972,896.62 = 390,670.50/x
  3. Step 3: Cross multiply
    704,993.41x = 972,896.62 × 390,670.50
  4. Step 4: Simplify right side
    704,993.41x = 380,082,008,983.71
  5. Step 5: Solve for x
    x = 380,082,008,983.71/704,993.41
  6. Step 6: Final answer
    x = 539,128.46

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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.