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Finding the Fourth Proportional to 478,840.60, 718,260.90 and 329,541.40

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Solution

The fourth proportional to 478,840.60, 718,260.90 and 329,541.40 is: 494,312.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,840.60 : 718,260.90 = 329,541.40 : x
  2. Step 2: Convert to fraction form
    478,840.60/718,260.90 = 329,541.40/x
  3. Step 3: Cross multiply
    478,840.60x = 718,260.90 × 329,541.40
  4. Step 4: Simplify right side
    478,840.60x = 236,696,702,551.26
  5. Step 5: Solve for x
    x = 236,696,702,551.26/478,840.60
  6. Step 6: Final answer
    x = 494,312.10

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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.