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Finding the Fourth Proportional to 346,415.40, 519,623.10 and 290,428.20

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Solution

The fourth proportional to 346,415.40, 519,623.10 and 290,428.20 is: 435,642.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,415.40 : 519,623.10 = 290,428.20 : x
  2. Step 2: Convert to fraction form
    346,415.40/519,623.10 = 290,428.20/x
  3. Step 3: Cross multiply
    346,415.40x = 519,623.10 × 290,428.20
  4. Step 4: Simplify right side
    346,415.40x = 150,913,201,611.42
  5. Step 5: Solve for x
    x = 150,913,201,611.42/346,415.40
  6. Step 6: Final answer
    x = 435,642.30

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Similar ratio
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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.