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Finding the Fourth Proportional to 1,319,994, 1,821,591.72 and 716,382

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Solution

The fourth proportional to 1,319,994, 1,821,591.72 and 716,382 is: 988,607.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,994 : 1,821,591.72 = 716,382 : x
  2. Step 2: Convert to fraction form
    1,319,994/1,821,591.72 = 716,382/x
  3. Step 3: Cross multiply
    1,319,994x = 1,821,591.72 × 716,382
  4. Step 4: Simplify right side
    1,319,994x = 1,304,955,519,557.04
  5. Step 5: Solve for x
    x = 1,304,955,519,557.04/1,319,994
  6. Step 6: Final answer
    x = 988,607.16

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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.