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Finding the Fourth Proportional to 255,815.20, 383,722.80 and 202,938.40

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Solution

The fourth proportional to 255,815.20, 383,722.80 and 202,938.40 is: 304,407.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,815.20 : 383,722.80 = 202,938.40 : x
  2. Step 2: Convert to fraction form
    255,815.20/383,722.80 = 202,938.40/x
  3. Step 3: Cross multiply
    255,815.20x = 383,722.80 × 202,938.40
  4. Step 4: Simplify right side
    255,815.20x = 77,872,091,075.52
  5. Step 5: Solve for x
    x = 77,872,091,075.52/255,815.20
  6. Step 6: Final answer
    x = 304,407.60

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1.5x scale

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.