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Finding the Fourth Proportional to 551,715.48, 761,382.60 and 388,423.92

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Solution

The fourth proportional to 551,715.48, 761,382.60 and 388,423.92 is: 536,035.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,715.48 : 761,382.60 = 388,423.92 : x
  2. Step 2: Convert to fraction form
    551,715.48/761,382.60 = 388,423.92/x
  3. Step 3: Cross multiply
    551,715.48x = 761,382.60 × 388,423.92
  4. Step 4: Simplify right side
    551,715.48x = 295,739,214,111.79
  5. Step 5: Solve for x
    x = 295,739,214,111.79/551,715.48
  6. Step 6: Final answer
    x = 536,035.74

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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.