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Finding the Fourth Proportional to 478,718.10, 718,077.15 and 329,418.90

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Solution

The fourth proportional to 478,718.10, 718,077.15 and 329,418.90 is: 494,128.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,718.10 : 718,077.15 = 329,418.90 : x
  2. Step 2: Convert to fraction form
    478,718.10/718,077.15 = 329,418.90/x
  3. Step 3: Cross multiply
    478,718.10x = 718,077.15 × 329,418.90
  4. Step 4: Simplify right side
    478,718.10x = 236,548,184,868.14
  5. Step 5: Solve for x
    x = 236,548,184,868.14/478,718.10
  6. Step 6: Final answer
    x = 494,128.35

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Similar ratio
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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.