Home / 1,328,712,739.20-1,993,069,108.80-812,152,087.20

Finding the Fourth Proportional to 1,328,712,739.20, 1,993,069,108.80 and 812,152,087.20

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Solution

The fourth proportional to 1,328,712,739.20, 1,993,069,108.80 and 812,152,087.20 is: 1,218,228,130.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328,712,739.20 : 1,993,069,108.80 = 812,152,087.20 : x
  2. Step 2: Convert to fraction form
    1,328,712,739.20/1,993,069,108.80 = 812,152,087.20/x
  3. Step 3: Cross multiply
    1,328,712,739.20x = 1,993,069,108.80 × 812,152,087.20
  4. Step 4: Simplify right side
    1,328,712,739.20x = 1,618,675,236,645,763,840
  5. Step 5: Solve for x
    x = 1,618,675,236,645,763,840/1,328,712,739.20
  6. Step 6: Final answer
    x = 1,218,228,130.80

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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.