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Finding the Fourth Proportional to 477,320.90, 715,965.15 and 122,338.40

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Solution

The fourth proportional to 477,320.90, 715,965.15 and 122,338.40 is: 183,503.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    477,320.90 : 715,965.15 = 122,338.40 : x
  2. Step 2: Convert to fraction form
    477,320.90/715,965.15 = 122,338.40/x
  3. Step 3: Cross multiply
    477,320.90x = 715,965.15 × 122,338.40
  4. Step 4: Simplify right side
    477,320.90x = 87,590,030,906.76
  5. Step 5: Solve for x
    x = 87,590,030,906.76/477,320.90
  6. Step 6: Final answer
    x = 183,503.45

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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.