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Finding the Fourth Proportional to 617,913.40, 926,870.10 and 285,489.40

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Solution

The fourth proportional to 617,913.40, 926,870.10 and 285,489.40 is: 428,234.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,913.40 : 926,870.10 = 285,489.40 : x
  2. Step 2: Convert to fraction form
    617,913.40/926,870.10 = 285,489.40/x
  3. Step 3: Cross multiply
    617,913.40x = 926,870.10 × 285,489.40
  4. Step 4: Simplify right side
    617,913.40x = 264,611,588,726.94
  5. Step 5: Solve for x
    x = 264,611,588,726.94/617,913.40
  6. Step 6: Final answer
    x = 428,234.10

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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.