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Finding the Fourth Proportional to 346,689.40, 520,034.10 and 287,591.80

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Solution

The fourth proportional to 346,689.40, 520,034.10 and 287,591.80 is: 431,387.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,689.40 : 520,034.10 = 287,591.80 : x
  2. Step 2: Convert to fraction form
    346,689.40/520,034.10 = 287,591.80/x
  3. Step 3: Cross multiply
    346,689.40x = 520,034.10 × 287,591.80
  4. Step 4: Simplify right side
    346,689.40x = 149,557,542,880.38
  5. Step 5: Solve for x
    x = 149,557,542,880.38/346,689.40
  6. Step 6: Final answer
    x = 431,387.70

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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.