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Finding the Fourth Proportional to 984,689.11, 1,477,218.95 and 678,234.52

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Solution

The fourth proportional to 984,689.11, 1,477,218.95 and 678,234.52 is: 1,017,479.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    984,689.11 : 1,477,218.95 = 678,234.52 : x
  2. Step 2: Convert to fraction form
    984,689.11/1,477,218.95 = 678,234.52/x
  3. Step 3: Cross multiply
    984,689.11x = 1,477,218.95 × 678,234.52
  4. Step 4: Simplify right side
    984,689.11x = 1,001,900,885,488.15
  5. Step 5: Solve for x
    x = 1,001,900,885,488.15/984,689.11
  6. Step 6: Final answer
    x = 1,017,479.40

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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.