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Finding the Fourth Proportional to 518,505.70, 778,037.40 and 499,632.92

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Solution

The fourth proportional to 518,505.70, 778,037.40 and 499,632.92 is: 749,718.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,505.70 : 778,037.40 = 499,632.92 : x
  2. Step 2: Convert to fraction form
    518,505.70/778,037.40 = 499,632.92/x
  3. Step 3: Cross multiply
    518,505.70x = 778,037.40 × 499,632.92
  4. Step 4: Simplify right side
    518,505.70x = 388,733,091,642.86
  5. Step 5: Solve for x
    x = 388,733,091,642.86/518,505.70
  6. Step 6: Final answer
    x = 749,718.07

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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.