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Finding the Fourth Proportional to 620,658.40, 931,160.40 and 305,125.60

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Solution

The fourth proportional to 620,658.40, 931,160.40 and 305,125.60 is: 457,773.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,658.40 : 931,160.40 = 305,125.60 : x
  2. Step 2: Convert to fraction form
    620,658.40/931,160.40 = 305,125.60/x
  3. Step 3: Cross multiply
    620,658.40x = 931,160.40 × 305,125.60
  4. Step 4: Simplify right side
    620,658.40x = 284,120,875,746.24
  5. Step 5: Solve for x
    x = 284,120,875,746.24/620,658.40
  6. Step 6: Final answer
    x = 457,773.35

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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.