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Finding the Fourth Proportional to 762.30, 1,051.91 and 430.76

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Solution

The fourth proportional to 762.30, 1,051.91 and 430.76 is: 594.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.30 : 1,051.91 = 430.76 : x
  2. Step 2: Convert to fraction form
    762.30/1,051.91 = 430.76/x
  3. Step 3: Cross multiply
    762.30x = 1,051.91 × 430.76
  4. Step 4: Simplify right side
    762.30x = 453,113.34
  5. Step 5: Solve for x
    x = 453,113.34/762.30
  6. Step 6: Final answer
    x = 594.40

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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.