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Finding the Fourth Proportional to 880,765.84, 1,215,463.08 and 478,357.84

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Solution

The fourth proportional to 880,765.84, 1,215,463.08 and 478,357.84 is: 660,137.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    880,765.84 : 1,215,463.08 = 478,357.84 : x
  2. Step 2: Convert to fraction form
    880,765.84/1,215,463.08 = 478,357.84/x
  3. Step 3: Cross multiply
    880,765.84x = 1,215,463.08 × 478,357.84
  4. Step 4: Simplify right side
    880,765.84x = 581,426,293,548.55
  5. Step 5: Solve for x
    x = 581,426,293,548.55/880,765.84
  6. Step 6: Final answer
    x = 660,137.20

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Why These Related Problems?

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