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Finding the Fourth Proportional to 398,291.45, 549,104.67 and 385,908.17

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Solution

The fourth proportional to 398,291.45, 549,104.67 and 385,908.17 is: 532,032.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,291.45 : 549,104.67 = 385,908.17 : x
  2. Step 2: Convert to fraction form
    398,291.45/549,104.67 = 385,908.17/x
  3. Step 3: Cross multiply
    398,291.45x = 549,104.67 × 385,908.17
  4. Step 4: Simplify right side
    398,291.45x = 211,903,975,592.63
  5. Step 5: Solve for x
    x = 211,903,975,592.63/398,291.45
  6. Step 6: Final answer
    x = 532,032.46

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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.