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Finding the Fourth Proportional to 877,907.78, 1,211,611.06 and 495,959.16

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Solution

The fourth proportional to 877,907.78, 1,211,611.06 and 495,959.16 is: 684,479.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,907.78 : 1,211,611.06 = 495,959.16 : x
  2. Step 2: Convert to fraction form
    877,907.78/1,211,611.06 = 495,959.16/x
  3. Step 3: Cross multiply
    877,907.78x = 1,211,611.06 × 495,959.16
  4. Step 4: Simplify right side
    877,907.78x = 600,909,603,564.31
  5. Step 5: Solve for x
    x = 600,909,603,564.31/877,907.78
  6. Step 6: Final answer
    x = 684,479.19

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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.