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Finding the Fourth Proportional to 636,733.68, 879,185.69 and 489,325.05

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Solution

The fourth proportional to 636,733.68, 879,185.69 and 489,325.05 is: 675,647.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,733.68 : 879,185.69 = 489,325.05 : x
  2. Step 2: Convert to fraction form
    636,733.68/879,185.69 = 489,325.05/x
  3. Step 3: Cross multiply
    636,733.68x = 879,185.69 × 489,325.05
  4. Step 4: Simplify right side
    636,733.68x = 430,207,580,762.81
  5. Step 5: Solve for x
    x = 430,207,580,762.81/636,733.68
  6. Step 6: Final answer
    x = 675,647.60

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1.5x scale

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.