Home / 769,312.09-1,061,653.91-420,459.51

Finding the Fourth Proportional to 769,312.09, 1,061,653.91 and 420,459.51

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Solution

The fourth proportional to 769,312.09, 1,061,653.91 and 420,459.51 is: 580,235.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,312.09 : 1,061,653.91 = 420,459.51 : x
  2. Step 2: Convert to fraction form
    769,312.09/1,061,653.91 = 420,459.51/x
  3. Step 3: Cross multiply
    769,312.09x = 1,061,653.91 × 420,459.51
  4. Step 4: Simplify right side
    769,312.09x = 446,382,482,788.18
  5. Step 5: Solve for x
    x = 446,382,482,788.18/769,312.09
  6. Step 6: Final answer
    x = 580,235.89

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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.