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Finding the Fourth Proportional to 407,831.20, 611,746.80 and 401,926.30

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Solution

The fourth proportional to 407,831.20, 611,746.80 and 401,926.30 is: 602,889.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,831.20 : 611,746.80 = 401,926.30 : x
  2. Step 2: Convert to fraction form
    407,831.20/611,746.80 = 401,926.30/x
  3. Step 3: Cross multiply
    407,831.20x = 611,746.80 × 401,926.30
  4. Step 4: Simplify right side
    407,831.20x = 245,877,127,860.84
  5. Step 5: Solve for x
    x = 245,877,127,860.84/407,831.20
  6. Step 6: Final answer
    x = 602,889.45

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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.