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Finding the Fourth Proportional to 488,793.40, 732,606.90 and 438,638.20

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Solution

The fourth proportional to 488,793.40, 732,606.90 and 438,638.20 is: 657,433.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,793.40 : 732,606.90 = 438,638.20 : x
  2. Step 2: Convert to fraction form
    488,793.40/732,606.90 = 438,638.20/x
  3. Step 3: Cross multiply
    488,793.40x = 732,606.90 × 438,638.20
  4. Step 4: Simplify right side
    488,793.40x = 321,349,371,923.58
  5. Step 5: Solve for x
    x = 321,349,371,923.58/488,793.40
  6. Step 6: Final answer
    x = 657,433.94

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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.