Home / 431,742.35-647,831.89-287,746.42

Finding the Fourth Proportional to 431,742.35, 647,831.89 and 287,746.42

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Solution

The fourth proportional to 431,742.35, 647,831.89 and 287,746.42 is: 431,765.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,742.35 : 647,831.89 = 287,746.42 : x
  2. Step 2: Convert to fraction form
    431,742.35/647,831.89 = 287,746.42/x
  3. Step 3: Cross multiply
    431,742.35x = 647,831.89 × 287,746.42
  4. Step 4: Simplify right side
    431,742.35x = 186,411,307,064.12
  5. Step 5: Solve for x
    x = 186,411,307,064.12/431,742.35
  6. Step 6: Final answer
    x = 431,765.17

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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.