Home / 920,369.51-1,380,763.40-280,730.45

Finding the Fourth Proportional to 920,369.51, 1,380,763.40 and 280,730.45

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Solution

The fourth proportional to 920,369.51, 1,380,763.40 and 280,730.45 is: 421,159.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,369.51 : 1,380,763.40 = 280,730.45 : x
  2. Step 2: Convert to fraction form
    920,369.51/1,380,763.40 = 280,730.45/x
  3. Step 3: Cross multiply
    920,369.51x = 1,380,763.40 × 280,730.45
  4. Step 4: Simplify right side
    920,369.51x = 387,622,330,625.53
  5. Step 5: Solve for x
    x = 387,622,330,625.53/920,369.51
  6. Step 6: Final answer
    x = 421,159.47

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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.