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Finding the Fourth Proportional to 636,407.86, 878,246.14 and 349,946.50

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Solution

The fourth proportional to 636,407.86, 878,246.14 and 349,946.50 is: 482,927.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,407.86 : 878,246.14 = 349,946.50 : x
  2. Step 2: Convert to fraction form
    636,407.86/878,246.14 = 349,946.50/x
  3. Step 3: Cross multiply
    636,407.86x = 878,246.14 × 349,946.50
  4. Step 4: Simplify right side
    636,407.86x = 307,339,162,831.51
  5. Step 5: Solve for x
    x = 307,339,162,831.51/636,407.86
  6. Step 6: Final answer
    x = 482,927.98

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1.5x scale

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.