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Finding the Fourth Proportional to 768,320.40, 1,152,480.60 and 489,075.60

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Solution

The fourth proportional to 768,320.40, 1,152,480.60 and 489,075.60 is: 733,613.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,320.40 : 1,152,480.60 = 489,075.60 : x
  2. Step 2: Convert to fraction form
    768,320.40/1,152,480.60 = 489,075.60/x
  3. Step 3: Cross multiply
    768,320.40x = 1,152,480.60 × 489,075.60
  4. Step 4: Simplify right side
    768,320.40x = 563,650,140,933.36
  5. Step 5: Solve for x
    x = 563,650,140,933.36/768,320.40
  6. Step 6: Final answer
    x = 733,613.40

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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.