Home / 498,078.72-687,320.64-283,271.04

Finding the Fourth Proportional to 498,078.72, 687,320.64 and 283,271.04

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Solution

The fourth proportional to 498,078.72, 687,320.64 and 283,271.04 is: 390,898.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,078.72 : 687,320.64 = 283,271.04 : x
  2. Step 2: Convert to fraction form
    498,078.72/687,320.64 = 283,271.04/x
  3. Step 3: Cross multiply
    498,078.72x = 687,320.64 × 283,271.04
  4. Step 4: Simplify right side
    498,078.72x = 194,698,032,506.27
  5. Step 5: Solve for x
    x = 194,698,032,506.27/498,078.72
  6. Step 6: Final answer
    x = 390,898.11

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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.