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Finding the Fourth Proportional to 558,215.67, 770,319.59 and 316,519.77

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Solution

The fourth proportional to 558,215.67, 770,319.59 and 316,519.77 is: 436,787.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,215.67 : 770,319.59 = 316,519.77 : x
  2. Step 2: Convert to fraction form
    558,215.67/770,319.59 = 316,519.77/x
  3. Step 3: Cross multiply
    558,215.67x = 770,319.59 × 316,519.77
  4. Step 4: Simplify right side
    558,215.67x = 243,821,379,453.29
  5. Step 5: Solve for x
    x = 243,821,379,453.29/558,215.67
  6. Step 6: Final answer
    x = 436,787.06

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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.