Home / 920,307.09-1,380,523.71-312,848.21

Finding the Fourth Proportional to 920,307.09, 1,380,523.71 and 312,848.21

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Solution

The fourth proportional to 920,307.09, 1,380,523.71 and 312,848.21 is: 469,293.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,307.09 : 1,380,523.71 = 312,848.21 : x
  2. Step 2: Convert to fraction form
    920,307.09/1,380,523.71 = 312,848.21/x
  3. Step 3: Cross multiply
    920,307.09x = 1,380,523.71 × 312,848.21
  4. Step 4: Simplify right side
    920,307.09x = 431,894,369,971.82
  5. Step 5: Solve for x
    x = 431,894,369,971.82/920,307.09
  6. Step 6: Final answer
    x = 469,293.75

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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.