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Finding the Fourth Proportional to 740.75, 1,021.62 and 554.68

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Solution

The fourth proportional to 740.75, 1,021.62 and 554.68 is: 765.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.75 : 1,021.62 = 554.68 : x
  2. Step 2: Convert to fraction form
    740.75/1,021.62 = 554.68/x
  3. Step 3: Cross multiply
    740.75x = 1,021.62 × 554.68
  4. Step 4: Simplify right side
    740.75x = 566,672.42
  5. Step 5: Solve for x
    x = 566,672.42/740.75
  6. Step 6: Final answer
    x = 765.00

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Find fourth proportional to 370.38, 510.81 and 277.34
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.