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Finding the Fourth Proportional to 1,388,235,813.55, 1,915,800,671.34 and 761,704,075.42

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Solution

The fourth proportional to 1,388,235,813.55, 1,915,800,671.34 and 761,704,075.42 is: 1,051,170,964.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,235,813.55 : 1,915,800,671.34 = 761,704,075.42 : x
  2. Step 2: Convert to fraction form
    1,388,235,813.55/1,915,800,671.34 = 761,704,075.42/x
  3. Step 3: Cross multiply
    1,388,235,813.55x = 1,915,800,671.34 × 761,704,075.42
  4. Step 4: Simplify right side
    1,388,235,813.55x = 1,459,273,179,047,260,416
  5. Step 5: Solve for x
    x = 1,459,273,179,047,260,416/1,388,235,813.55
  6. Step 6: Final answer
    x = 1,051,170,964.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.