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Finding the Fourth Proportional to 880,821, 1,215,534.20 and 478,413

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Solution

The fourth proportional to 880,821, 1,215,534.20 and 478,413 is: 660,210.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    880,821 : 1,215,534.20 = 478,413 : x
  2. Step 2: Convert to fraction form
    880,821/1,215,534.20 = 478,413/x
  3. Step 3: Cross multiply
    880,821x = 1,215,534.20 × 478,413
  4. Step 4: Simplify right side
    880,821x = 581,527,360,832.54
  5. Step 5: Solve for x
    x = 581,527,360,832.54/880,821
  6. Step 6: Final answer
    x = 660,210.60

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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.