Home / 426,502.40-636,988.19-386,441.28

Finding the Fourth Proportional to 426,502.40, 636,988.19 and 386,441.28

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Solution

The fourth proportional to 426,502.40, 636,988.19 and 386,441.28 is: 577,156.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,502.40 : 636,988.19 = 386,441.28 : x
  2. Step 2: Convert to fraction form
    426,502.40/636,988.19 = 386,441.28/x
  3. Step 3: Cross multiply
    426,502.40x = 636,988.19 × 386,441.28
  4. Step 4: Simplify right side
    426,502.40x = 246,158,529,556.28
  5. Step 5: Solve for x
    x = 246,158,529,556.28/426,502.40
  6. Step 6: Final answer
    x = 577,156.27

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.