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Finding the Fourth Proportional to 1,259,714,728.80, 1,889,572,093.20 and 639,841,946.40

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Solution

The fourth proportional to 1,259,714,728.80, 1,889,572,093.20 and 639,841,946.40 is: 959,762,919.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,259,714,728.80 : 1,889,572,093.20 = 639,841,946.40 : x
  2. Step 2: Convert to fraction form
    1,259,714,728.80/1,889,572,093.20 = 639,841,946.40/x
  3. Step 3: Cross multiply
    1,259,714,728.80x = 1,889,572,093.20 × 639,841,946.40
  4. Step 4: Simplify right side
    1,259,714,728.80x = 1,209,027,485,976,210,176
  5. Step 5: Solve for x
    x = 1,209,027,485,976,210,176/1,259,714,728.80
  6. Step 6: Final answer
    x = 959,762,919.60

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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.