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Finding the Fourth Proportional to 346,987.80, 519,606.90 and 257,758.20

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Solution

The fourth proportional to 346,987.80, 519,606.90 and 257,758.20 is: 385,987.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,987.80 : 519,606.90 = 257,758.20 : x
  2. Step 2: Convert to fraction form
    346,987.80/519,606.90 = 257,758.20/x
  3. Step 3: Cross multiply
    346,987.80x = 519,606.90 × 257,758.20
  4. Step 4: Simplify right side
    346,987.80x = 133,932,939,251.58
  5. Step 5: Solve for x
    x = 133,932,939,251.58/346,987.80
  6. Step 6: Final answer
    x = 385,987.46

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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.