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Finding the Fourth Proportional to 612,811.80, 918,124.20 and 296,571.60

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Solution

The fourth proportional to 612,811.80, 918,124.20 and 296,571.60 is: 444,328.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,811.80 : 918,124.20 = 296,571.60 : x
  2. Step 2: Convert to fraction form
    612,811.80/918,124.20 = 296,571.60/x
  3. Step 3: Cross multiply
    612,811.80x = 918,124.20 × 296,571.60
  4. Step 4: Simplify right side
    612,811.80x = 272,289,562,992.72
  5. Step 5: Solve for x
    x = 272,289,562,992.72/612,811.80
  6. Step 6: Final answer
    x = 444,328.20

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1.5x scale

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.