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Finding the Fourth Proportional to 879,574.80, 1,319,337.90 and 280,571.70

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Solution

The fourth proportional to 879,574.80, 1,319,337.90 and 280,571.70 is: 420,849.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,574.80 : 1,319,337.90 = 280,571.70 : x
  2. Step 2: Convert to fraction form
    879,574.80/1,319,337.90 = 280,571.70/x
  3. Step 3: Cross multiply
    879,574.80x = 1,319,337.90 × 280,571.70
  4. Step 4: Simplify right side
    879,574.80x = 370,168,877,477.43
  5. Step 5: Solve for x
    x = 370,168,877,477.43/879,574.80
  6. Step 6: Final answer
    x = 420,849.80

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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.