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Finding the Fourth Proportional to 645,795.07, 890,692.28 and 419,513.47

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Solution

The fourth proportional to 645,795.07, 890,692.28 and 419,513.47 is: 578,600.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,795.07 : 890,692.28 = 419,513.47 : x
  2. Step 2: Convert to fraction form
    645,795.07/890,692.28 = 419,513.47/x
  3. Step 3: Cross multiply
    645,795.07x = 890,692.28 × 419,513.47
  4. Step 4: Simplify right side
    645,795.07x = 373,657,406,987.44
  5. Step 5: Solve for x
    x = 373,657,406,987.44/645,795.07
  6. Step 6: Final answer
    x = 578,600.59

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.