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Finding the Fourth Proportional to 438,428.80, 657,643.20 and 157,955.20

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Solution

The fourth proportional to 438,428.80, 657,643.20 and 157,955.20 is: 236,932.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,428.80 : 657,643.20 = 157,955.20 : x
  2. Step 2: Convert to fraction form
    438,428.80/657,643.20 = 157,955.20/x
  3. Step 3: Cross multiply
    438,428.80x = 657,643.20 × 157,955.20
  4. Step 4: Simplify right side
    438,428.80x = 103,878,163,184.64
  5. Step 5: Solve for x
    x = 103,878,163,184.64/438,428.80
  6. Step 6: Final answer
    x = 236,932.80

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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.