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Finding the Fourth Proportional to 477.04, 714.84 and 312.40

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Solution

The fourth proportional to 477.04, 714.84 and 312.40 is: 468.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.04 : 714.84 = 312.40 : x
  2. Step 2: Convert to fraction form
    477.04/714.84 = 312.40/x
  3. Step 3: Cross multiply
    477.04x = 714.84 × 312.40
  4. Step 4: Simplify right side
    477.04x = 223,316.02
  5. Step 5: Solve for x
    x = 223,316.02/477.04
  6. Step 6: Final answer
    x = 468.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.