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Finding the Fourth Proportional to 438,322.80, 657,484.20 and 279,692.40

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Solution

The fourth proportional to 438,322.80, 657,484.20 and 279,692.40 is: 419,538.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,322.80 : 657,484.20 = 279,692.40 : x
  2. Step 2: Convert to fraction form
    438,322.80/657,484.20 = 279,692.40/x
  3. Step 3: Cross multiply
    438,322.80x = 657,484.20 × 279,692.40
  4. Step 4: Simplify right side
    438,322.80x = 183,893,333,860.08
  5. Step 5: Solve for x
    x = 183,893,333,860.08/438,322.80
  6. Step 6: Final answer
    x = 419,538.60

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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.