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Finding the Fourth Proportional to 751.64, 1,037.70 and 457

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Solution

The fourth proportional to 751.64, 1,037.70 and 457 is: 630.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    751.64 : 1,037.70 = 457 : x
  2. Step 2: Convert to fraction form
    751.64/1,037.70 = 457/x
  3. Step 3: Cross multiply
    751.64x = 1,037.70 × 457
  4. Step 4: Simplify right side
    751.64x = 474,228.90
  5. Step 5: Solve for x
    x = 474,228.90/751.64
  6. Step 6: Final answer
    x = 630.93

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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.