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Finding the Fourth Proportional to 631,294.81, 871,501.12 and 389,710.60

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Solution

The fourth proportional to 631,294.81, 871,501.12 and 389,710.60 is: 537,994.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,294.81 : 871,501.12 = 389,710.60 : x
  2. Step 2: Convert to fraction form
    631,294.81/871,501.12 = 389,710.60/x
  3. Step 3: Cross multiply
    631,294.81x = 871,501.12 × 389,710.60
  4. Step 4: Simplify right side
    631,294.81x = 339,633,221,222.84
  5. Step 5: Solve for x
    x = 339,633,221,222.84/631,294.81
  6. Step 6: Final answer
    x = 537,994.64

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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.