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Finding the Fourth Proportional to 438,419.20, 657,628.80 and 157,835.20

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Solution

The fourth proportional to 438,419.20, 657,628.80 and 157,835.20 is: 236,752.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,419.20 : 657,628.80 = 157,835.20 : x
  2. Step 2: Convert to fraction form
    438,419.20/657,628.80 = 157,835.20/x
  3. Step 3: Cross multiply
    438,419.20x = 657,628.80 × 157,835.20
  4. Step 4: Simplify right side
    438,419.20x = 103,796,973,173.76
  5. Step 5: Solve for x
    x = 103,796,973,173.76/438,419.20
  6. Step 6: Final answer
    x = 236,752.80

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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.