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Finding the Fourth Proportional to 879,559.84, 1,213,690.08 and 492,396.40

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Solution

The fourth proportional to 879,559.84, 1,213,690.08 and 492,396.40 is: 679,449.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,559.84 : 1,213,690.08 = 492,396.40 : x
  2. Step 2: Convert to fraction form
    879,559.84/1,213,690.08 = 492,396.40/x
  3. Step 3: Cross multiply
    879,559.84x = 1,213,690.08 × 492,396.40
  4. Step 4: Simplify right side
    879,559.84x = 597,616,626,107.71
  5. Step 5: Solve for x
    x = 597,616,626,107.71/879,559.84
  6. Step 6: Final answer
    x = 679,449.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.