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Finding the Fourth Proportional to 885,528,019.60, 1,328,292,029.40 and 678,903,758.80

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Solution

The fourth proportional to 885,528,019.60, 1,328,292,029.40 and 678,903,758.80 is: 1,018,355,638.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,528,019.60 : 1,328,292,029.40 = 678,903,758.80 : x
  2. Step 2: Convert to fraction form
    885,528,019.60/1,328,292,029.40 = 678,903,758.80/x
  3. Step 3: Cross multiply
    885,528,019.60x = 1,328,292,029.40 × 678,903,758.80
  4. Step 4: Simplify right side
    885,528,019.60x = 901,782,451,543,740,160
  5. Step 5: Solve for x
    x = 901,782,451,543,740,160/885,528,019.60
  6. Step 6: Final answer
    x = 1,018,355,638.20

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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.