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Finding the Fourth Proportional to 438,328.80, 657,444.60 and 359,305.20

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Solution

The fourth proportional to 438,328.80, 657,444.60 and 359,305.20 is: 538,917.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,328.80 : 657,444.60 = 359,305.20 : x
  2. Step 2: Convert to fraction form
    438,328.80/657,444.60 = 359,305.20/x
  3. Step 3: Cross multiply
    438,328.80x = 657,444.60 × 359,305.20
  4. Step 4: Simplify right side
    438,328.80x = 236,223,263,491.92
  5. Step 5: Solve for x
    x = 236,223,263,491.92/438,328.80
  6. Step 6: Final answer
    x = 538,917.96

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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.