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Finding the Fourth Proportional to 810.55, 1,117.02 and 670.83

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Solution

The fourth proportional to 810.55, 1,117.02 and 670.83 is: 924.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.55 : 1,117.02 = 670.83 : x
  2. Step 2: Convert to fraction form
    810.55/1,117.02 = 670.83/x
  3. Step 3: Cross multiply
    810.55x = 1,117.02 × 670.83
  4. Step 4: Simplify right side
    810.55x = 749,330.53
  5. Step 5: Solve for x
    x = 749,330.53/810.55
  6. Step 6: Final answer
    x = 924.47

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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.