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Finding the Fourth Proportional to 489,919.20, 734,878.80 and 471,256.80

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Solution

The fourth proportional to 489,919.20, 734,878.80 and 471,256.80 is: 706,885.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,919.20 : 734,878.80 = 471,256.80 : x
  2. Step 2: Convert to fraction form
    489,919.20/734,878.80 = 471,256.80/x
  3. Step 3: Cross multiply
    489,919.20x = 734,878.80 × 471,256.80
  4. Step 4: Simplify right side
    489,919.20x = 346,316,631,675.84
  5. Step 5: Solve for x
    x = 346,316,631,675.84/489,919.20
  6. Step 6: Final answer
    x = 706,885.20

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1.5x scale

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.