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Finding the Fourth Proportional to 485,007.89, 669,278.86 and 291,300.50

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Solution

The fourth proportional to 485,007.89, 669,278.86 and 291,300.50 is: 401,975.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,007.89 : 669,278.86 = 291,300.50 : x
  2. Step 2: Convert to fraction form
    485,007.89/669,278.86 = 291,300.50/x
  3. Step 3: Cross multiply
    485,007.89x = 669,278.86 × 291,300.50
  4. Step 4: Simplify right side
    485,007.89x = 194,961,263,211.04
  5. Step 5: Solve for x
    x = 194,961,263,211.04/485,007.89
  6. Step 6: Final answer
    x = 401,975.45

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1.5x scale

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.