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Finding the Fourth Proportional to 476.40, 710.80 and 407.16

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Solution

The fourth proportional to 476.40, 710.80 and 407.16 is: 607.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.40 : 710.80 = 407.16 : x
  2. Step 2: Convert to fraction form
    476.40/710.80 = 407.16/x
  3. Step 3: Cross multiply
    476.40x = 710.80 × 407.16
  4. Step 4: Simplify right side
    476.40x = 289,409.33
  5. Step 5: Solve for x
    x = 289,409.33/476.40
  6. Step 6: Final answer
    x = 607.49

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.