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Finding the Fourth Proportional to 620,782.20, 931,043.70 and 265,807.80

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Solution

The fourth proportional to 620,782.20, 931,043.70 and 265,807.80 is: 398,656.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,782.20 : 931,043.70 = 265,807.80 : x
  2. Step 2: Convert to fraction form
    620,782.20/931,043.70 = 265,807.80/x
  3. Step 3: Cross multiply
    620,782.20x = 931,043.70 × 265,807.80
  4. Step 4: Simplify right side
    620,782.20x = 247,478,677,600.86
  5. Step 5: Solve for x
    x = 247,478,677,600.86/620,782.20
  6. Step 6: Final answer
    x = 398,656.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.