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Finding the Fourth Proportional to 953.49, 1,430.30 and 376.77

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Solution

The fourth proportional to 953.49, 1,430.30 and 376.77 is: 565.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.49 : 1,430.30 = 376.77 : x
  2. Step 2: Convert to fraction form
    953.49/1,430.30 = 376.77/x
  3. Step 3: Cross multiply
    953.49x = 1,430.30 × 376.77
  4. Step 4: Simplify right side
    953.49x = 538,894.13
  5. Step 5: Solve for x
    x = 538,894.13/953.49
  6. Step 6: Final answer
    x = 565.18

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Double scale
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1.5x scale

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.