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Finding the Fourth Proportional to 879,599.84, 1,213,978.32 and 557,340.12

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Solution

The fourth proportional to 879,599.84, 1,213,978.32 and 557,340.12 is: 769,212.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,599.84 : 1,213,978.32 = 557,340.12 : x
  2. Step 2: Convert to fraction form
    879,599.84/1,213,978.32 = 557,340.12/x
  3. Step 3: Cross multiply
    879,599.84x = 1,213,978.32 × 557,340.12
  4. Step 4: Simplify right side
    879,599.84x = 676,598,822,546.20
  5. Step 5: Solve for x
    x = 676,598,822,546.20/879,599.84
  6. Step 6: Final answer
    x = 769,212.08

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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.