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Finding the Fourth Proportional to 656.76, 906.50 and 407.93

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Solution

The fourth proportional to 656.76, 906.50 and 407.93 is: 563.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.76 : 906.50 = 407.93 : x
  2. Step 2: Convert to fraction form
    656.76/906.50 = 407.93/x
  3. Step 3: Cross multiply
    656.76x = 906.50 × 407.93
  4. Step 4: Simplify right side
    656.76x = 369,788.55
  5. Step 5: Solve for x
    x = 369,788.55/656.76
  6. Step 6: Final answer
    x = 563.05

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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.