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Finding the Fourth Proportional to 631,785.20, 871,762.78 and 359,858.41

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Solution

The fourth proportional to 631,785.20, 871,762.78 and 359,858.41 is: 496,547.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,785.20 : 871,762.78 = 359,858.41 : x
  2. Step 2: Convert to fraction form
    631,785.20/871,762.78 = 359,858.41/x
  3. Step 3: Cross multiply
    631,785.20x = 871,762.78 × 359,858.41
  4. Step 4: Simplify right side
    631,785.20x = 313,711,167,907.98
  5. Step 5: Solve for x
    x = 313,711,167,907.98/631,785.20
  6. Step 6: Final answer
    x = 496,547.19

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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.