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Finding the Fourth Proportional to 805.63, 1,111.77 and 437.63

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Solution

The fourth proportional to 805.63, 1,111.77 and 437.63 is: 603.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    805.63 : 1,111.77 = 437.63 : x
  2. Step 2: Convert to fraction form
    805.63/1,111.77 = 437.63/x
  3. Step 3: Cross multiply
    805.63x = 1,111.77 × 437.63
  4. Step 4: Simplify right side
    805.63x = 486,543.91
  5. Step 5: Solve for x
    x = 486,543.91/805.63
  6. Step 6: Final answer
    x = 603.93

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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.