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Finding the Fourth Proportional to 551,571.04, 760,505.79 and 398,364.40

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Solution

The fourth proportional to 551,571.04, 760,505.79 and 398,364.40 is: 549,264.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,571.04 : 760,505.79 = 398,364.40 : x
  2. Step 2: Convert to fraction form
    551,571.04/760,505.79 = 398,364.40/x
  3. Step 3: Cross multiply
    551,571.04x = 760,505.79 × 398,364.40
  4. Step 4: Simplify right side
    551,571.04x = 302,958,432,729.88
  5. Step 5: Solve for x
    x = 302,958,432,729.88/551,571.04
  6. Step 6: Final answer
    x = 549,264.57

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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.