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Finding the Fourth Proportional to 1,386,420, 2,079,630 and 499,956

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Solution

The fourth proportional to 1,386,420, 2,079,630 and 499,956 is: 749,934

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386,420 : 2,079,630 = 499,956 : x
  2. Step 2: Convert to fraction form
    1,386,420/2,079,630 = 499,956/x
  3. Step 3: Cross multiply
    1,386,420x = 2,079,630 × 499,956
  4. Step 4: Simplify right side
    1,386,420x = 1,039,723,496,280
  5. Step 5: Solve for x
    x = 1,039,723,496,280/1,386,420
  6. Step 6: Final answer
    x = 749,934

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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.