Home / 1,280,402,438.40-1,920,402,518.40-406,888,692.48

Finding the Fourth Proportional to 1,280,402,438.40, 1,920,402,518.40 and 406,888,692.48

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Solution

The fourth proportional to 1,280,402,438.40, 1,920,402,518.40 and 406,888,692.48 is: 610,269,120.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,402,438.40 : 1,920,402,518.40 = 406,888,692.48 : x
  2. Step 2: Convert to fraction form
    1,280,402,438.40/1,920,402,518.40 = 406,888,692.48/x
  3. Step 3: Cross multiply
    1,280,402,438.40x = 1,920,402,518.40 × 406,888,692.48
  4. Step 4: Simplify right side
    1,280,402,438.40x = 781,390,069,747,075,200
  5. Step 5: Solve for x
    x = 781,390,069,747,075,200/1,280,402,438.40
  6. Step 6: Final answer
    x = 610,269,120.33

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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.