Home / 920,147.88-1,270,302.50-645,349.64

Finding the Fourth Proportional to 920,147.88, 1,270,302.50 and 645,349.64

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Solution

The fourth proportional to 920,147.88, 1,270,302.50 and 645,349.64 is: 890,932.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,147.88 : 1,270,302.50 = 645,349.64 : x
  2. Step 2: Convert to fraction form
    920,147.88/1,270,302.50 = 645,349.64/x
  3. Step 3: Cross multiply
    920,147.88x = 1,270,302.50 × 645,349.64
  4. Step 4: Simplify right side
    920,147.88x = 819,789,261,066.10
  5. Step 5: Solve for x
    x = 819,789,261,066.10/920,147.88
  6. Step 6: Final answer
    x = 890,932.08

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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.