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Finding the Fourth Proportional to 804.76, 1,111.74 and 543.92

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Solution

The fourth proportional to 804.76, 1,111.74 and 543.92 is: 751.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.76 : 1,111.74 = 543.92 : x
  2. Step 2: Convert to fraction form
    804.76/1,111.74 = 543.92/x
  3. Step 3: Cross multiply
    804.76x = 1,111.74 × 543.92
  4. Step 4: Simplify right side
    804.76x = 604,697.62
  5. Step 5: Solve for x
    x = 604,697.62/804.76
  6. Step 6: Final answer
    x = 751.40

Related Problems

Find fourth proportional to 402.38, 555.87 and 271.96
Half scale
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Double scale
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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.