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Finding the Fourth Proportional to 620,442.52, 856,177.80 and 348,521.87

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Solution

The fourth proportional to 620,442.52, 856,177.80 and 348,521.87 is: 480,941.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,442.52 : 856,177.80 = 348,521.87 : x
  2. Step 2: Convert to fraction form
    620,442.52/856,177.80 = 348,521.87/x
  3. Step 3: Cross multiply
    620,442.52x = 856,177.80 × 348,521.87
  4. Step 4: Simplify right side
    620,442.52x = 298,396,688,741.97
  5. Step 5: Solve for x
    x = 298,396,688,741.97/620,442.52
  6. Step 6: Final answer
    x = 480,941.72

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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.