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Finding the Fourth Proportional to 620,423.28, 930,638.88 and 339,787.44

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Solution

The fourth proportional to 620,423.28, 930,638.88 and 339,787.44 is: 509,683.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,423.28 : 930,638.88 = 339,787.44 : x
  2. Step 2: Convert to fraction form
    620,423.28/930,638.88 = 339,787.44/x
  3. Step 3: Cross multiply
    620,423.28x = 930,638.88 × 339,787.44
  4. Step 4: Simplify right side
    620,423.28x = 316,219,402,599.67
  5. Step 5: Solve for x
    x = 316,219,402,599.67/620,423.28
  6. Step 6: Final answer
    x = 509,683.33

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1.5x scale

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.