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Finding the Fourth Proportional to 878,866.40, 1,318,299.60 and 346,404.80

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Solution

The fourth proportional to 878,866.40, 1,318,299.60 and 346,404.80 is: 519,607.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,866.40 : 1,318,299.60 = 346,404.80 : x
  2. Step 2: Convert to fraction form
    878,866.40/1,318,299.60 = 346,404.80/x
  3. Step 3: Cross multiply
    878,866.40x = 1,318,299.60 × 346,404.80
  4. Step 4: Simplify right side
    878,866.40x = 456,665,309,278.08
  5. Step 5: Solve for x
    x = 456,665,309,278.08/878,866.40
  6. Step 6: Final answer
    x = 519,607.20

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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.