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Finding the Fourth Proportional to 631,356.96, 871,559.44 and 402,228.47

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Solution

The fourth proportional to 631,356.96, 871,559.44 and 402,228.47 is: 555,258.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,356.96 : 871,559.44 = 402,228.47 : x
  2. Step 2: Convert to fraction form
    631,356.96/871,559.44 = 402,228.47/x
  3. Step 3: Cross multiply
    631,356.96x = 871,559.44 × 402,228.47
  4. Step 4: Simplify right side
    631,356.96x = 350,566,020,065.26
  5. Step 5: Solve for x
    x = 350,566,020,065.26/631,356.96
  6. Step 6: Final answer
    x = 555,258.03

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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.