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Finding the Fourth Proportional to 520,059.85, 778,534.58 and 489,301.45

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Solution

The fourth proportional to 520,059.85, 778,534.58 and 489,301.45 is: 732,488.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,059.85 : 778,534.58 = 489,301.45 : x
  2. Step 2: Convert to fraction form
    520,059.85/778,534.58 = 489,301.45/x
  3. Step 3: Cross multiply
    520,059.85x = 778,534.58 × 489,301.45
  4. Step 4: Simplify right side
    520,059.85x = 380,938,096,422.63
  5. Step 5: Solve for x
    x = 380,938,096,422.63/520,059.85
  6. Step 6: Final answer
    x = 732,488.96

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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.