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Finding the Fourth Proportional to 548,547.28, 756,690.64 and 319,078.72

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Solution

The fourth proportional to 548,547.28, 756,690.64 and 319,078.72 is: 440,151.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,547.28 : 756,690.64 = 319,078.72 : x
  2. Step 2: Convert to fraction form
    548,547.28/756,690.64 = 319,078.72/x
  3. Step 3: Cross multiply
    548,547.28x = 756,690.64 × 319,078.72
  4. Step 4: Simplify right side
    548,547.28x = 241,443,880,847.18
  5. Step 5: Solve for x
    x = 241,443,880,847.18/548,547.28
  6. Step 6: Final answer
    x = 440,151.45

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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.