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Finding the Fourth Proportional to 515.04, 711.12 and 340.68

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Solution

The fourth proportional to 515.04, 711.12 and 340.68 is: 470.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.04 : 711.12 = 340.68 : x
  2. Step 2: Convert to fraction form
    515.04/711.12 = 340.68/x
  3. Step 3: Cross multiply
    515.04x = 711.12 × 340.68
  4. Step 4: Simplify right side
    515.04x = 242,264.36
  5. Step 5: Solve for x
    x = 242,264.36/515.04
  6. Step 6: Final answer
    x = 470.38

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.