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Finding the Fourth Proportional to 393,312.60, 589,968.90 and 348,989.40

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Solution

The fourth proportional to 393,312.60, 589,968.90 and 348,989.40 is: 523,484.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,312.60 : 589,968.90 = 348,989.40 : x
  2. Step 2: Convert to fraction form
    393,312.60/589,968.90 = 348,989.40/x
  3. Step 3: Cross multiply
    393,312.60x = 589,968.90 × 348,989.40
  4. Step 4: Simplify right side
    393,312.60x = 205,892,892,429.66
  5. Step 5: Solve for x
    x = 205,892,892,429.66/393,312.60
  6. Step 6: Final answer
    x = 523,484.10

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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.