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Finding the Fourth Proportional to 852,191,999.20, 1,278,287,998.80 and 818,748,978.40

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Solution

The fourth proportional to 852,191,999.20, 1,278,287,998.80 and 818,748,978.40 is: 1,228,123,467.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    852,191,999.20 : 1,278,287,998.80 = 818,748,978.40 : x
  2. Step 2: Convert to fraction form
    852,191,999.20/1,278,287,998.80 = 818,748,978.40/x
  3. Step 3: Cross multiply
    852,191,999.20x = 1,278,287,998.80 × 818,748,978.40
  4. Step 4: Simplify right side
    852,191,999.20x = 1,046,596,993,118,480,384
  5. Step 5: Solve for x
    x = 1,046,596,993,118,480,384/852,191,999.20
  6. Step 6: Final answer
    x = 1,228,123,467.60

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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.