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Finding the Fourth Proportional to 519,061.68, 716,355.21 and 315,065.58

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Solution

The fourth proportional to 519,061.68, 716,355.21 and 315,065.58 is: 434,820.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,061.68 : 716,355.21 = 315,065.58 : x
  2. Step 2: Convert to fraction form
    519,061.68/716,355.21 = 315,065.58/x
  3. Step 3: Cross multiply
    519,061.68x = 716,355.21 × 315,065.58
  4. Step 4: Simplify right side
    519,061.68x = 225,698,869,724.67
  5. Step 5: Solve for x
    x = 225,698,869,724.67/519,061.68
  6. Step 6: Final answer
    x = 434,820.91

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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.