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Finding the Fourth Proportional to 876,643.80, 1,314,965.70 and 841,214.40

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Solution

The fourth proportional to 876,643.80, 1,314,965.70 and 841,214.40 is: 1,261,821.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,643.80 : 1,314,965.70 = 841,214.40 : x
  2. Step 2: Convert to fraction form
    876,643.80/1,314,965.70 = 841,214.40/x
  3. Step 3: Cross multiply
    876,643.80x = 1,314,965.70 × 841,214.40
  4. Step 4: Simplify right side
    876,643.80x = 1,106,168,082,346.08
  5. Step 5: Solve for x
    x = 1,106,168,082,346.08/876,643.80
  6. Step 6: Final answer
    x = 1,261,821.60

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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.