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Finding the Fourth Proportional to 832.55, 1,148.85 and 478.58

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Solution

The fourth proportional to 832.55, 1,148.85 and 478.58 is: 660.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    832.55 : 1,148.85 = 478.58 : x
  2. Step 2: Convert to fraction form
    832.55/1,148.85 = 478.58/x
  3. Step 3: Cross multiply
    832.55x = 1,148.85 × 478.58
  4. Step 4: Simplify right side
    832.55x = 549,810.89
  5. Step 5: Solve for x
    x = 549,810.89/832.55
  6. Step 6: Final answer
    x = 660.40

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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.