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Finding the Fourth Proportional to 663.04, 914.70 and 430.12

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Solution

The fourth proportional to 663.04, 914.70 and 430.12 is: 593.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.04 : 914.70 = 430.12 : x
  2. Step 2: Convert to fraction form
    663.04/914.70 = 430.12/x
  3. Step 3: Cross multiply
    663.04x = 914.70 × 430.12
  4. Step 4: Simplify right side
    663.04x = 393,430.76
  5. Step 5: Solve for x
    x = 393,430.76/663.04
  6. Step 6: Final answer
    x = 593.37

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Half scale
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Double scale
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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.