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Finding the Fourth Proportional to 1,328,712,652.20, 1,993,068,978.30 and 812,152,000.20

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Solution

The fourth proportional to 1,328,712,652.20, 1,993,068,978.30 and 812,152,000.20 is: 1,218,228,000.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328,712,652.20 : 1,993,068,978.30 = 812,152,000.20 : x
  2. Step 2: Convert to fraction form
    1,328,712,652.20/1,993,068,978.30 = 812,152,000.20/x
  3. Step 3: Cross multiply
    1,328,712,652.20x = 1,993,068,978.30 × 812,152,000.20
  4. Step 4: Simplify right side
    1,328,712,652.20x = 1,618,674,957,262,915,328
  5. Step 5: Solve for x
    x = 1,618,674,957,262,915,328/1,328,712,652.20
  6. Step 6: Final answer
    x = 1,218,228,000.30

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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.