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Finding the Fourth Proportional to 856.60, 1,285.24 and 510.10

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Solution

The fourth proportional to 856.60, 1,285.24 and 510.10 is: 765.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    856.60 : 1,285.24 = 510.10 : x
  2. Step 2: Convert to fraction form
    856.60/1,285.24 = 510.10/x
  3. Step 3: Cross multiply
    856.60x = 1,285.24 × 510.10
  4. Step 4: Simplify right side
    856.60x = 655,593.22
  5. Step 5: Solve for x
    x = 655,593.22/856.60
  6. Step 6: Final answer
    x = 765.35

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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.