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Finding the Fourth Proportional to 678,794.60, 1,018,191.90 and 346,327.40

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Solution

The fourth proportional to 678,794.60, 1,018,191.90 and 346,327.40 is: 519,491.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,794.60 : 1,018,191.90 = 346,327.40 : x
  2. Step 2: Convert to fraction form
    678,794.60/1,018,191.90 = 346,327.40/x
  3. Step 3: Cross multiply
    678,794.60x = 1,018,191.90 × 346,327.40
  4. Step 4: Simplify right side
    678,794.60x = 352,627,753,428.06
  5. Step 5: Solve for x
    x = 352,627,753,428.06/678,794.60
  6. Step 6: Final answer
    x = 519,491.10

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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.