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Finding the Fourth Proportional to 485,319.48, 669,790.97 and 291,790.50

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Solution

The fourth proportional to 485,319.48, 669,790.97 and 291,790.50 is: 402,701.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,319.48 : 669,790.97 = 291,790.50 : x
  2. Step 2: Convert to fraction form
    485,319.48/669,790.97 = 291,790.50/x
  3. Step 3: Cross multiply
    485,319.48x = 669,790.97 × 291,790.50
  4. Step 4: Simplify right side
    485,319.48x = 195,438,642,031.79
  5. Step 5: Solve for x
    x = 195,438,642,031.79/485,319.48
  6. Step 6: Final answer
    x = 402,701.00

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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.