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Finding the Fourth Proportional to 623,718.40, 934,502.40 and 290,611.20

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Solution

The fourth proportional to 623,718.40, 934,502.40 and 290,611.20 is: 435,415.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,718.40 : 934,502.40 = 290,611.20 : x
  2. Step 2: Convert to fraction form
    623,718.40/934,502.40 = 290,611.20/x
  3. Step 3: Cross multiply
    623,718.40x = 934,502.40 × 290,611.20
  4. Step 4: Simplify right side
    623,718.40x = 271,576,863,866.88
  5. Step 5: Solve for x
    x = 271,576,863,866.88/623,718.40
  6. Step 6: Final answer
    x = 435,415.83

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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.