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Finding the Fourth Proportional to 346,216.80, 519,325.20 and 287,119.20

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Solution

The fourth proportional to 346,216.80, 519,325.20 and 287,119.20 is: 430,678.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,216.80 : 519,325.20 = 287,119.20 : x
  2. Step 2: Convert to fraction form
    346,216.80/519,325.20 = 287,119.20/x
  3. Step 3: Cross multiply
    346,216.80x = 519,325.20 × 287,119.20
  4. Step 4: Simplify right side
    346,216.80x = 149,108,235,963.84
  5. Step 5: Solve for x
    x = 149,108,235,963.84/346,216.80
  6. Step 6: Final answer
    x = 430,678.80

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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.