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Finding the Fourth Proportional to 879,897.75, 1,214,258.90 and 477,489.75

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Solution

The fourth proportional to 879,897.75, 1,214,258.90 and 477,489.75 is: 658,935.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,897.75 : 1,214,258.90 = 477,489.75 : x
  2. Step 2: Convert to fraction form
    879,897.75/1,214,258.90 = 477,489.75/x
  3. Step 3: Cross multiply
    879,897.75x = 1,214,258.90 × 477,489.75
  4. Step 4: Simplify right side
    879,897.75x = 579,796,176,208.83
  5. Step 5: Solve for x
    x = 579,796,176,208.83/879,897.75
  6. Step 6: Final answer
    x = 658,935.86

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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.