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Finding the Fourth Proportional to 487,621.80, 730,007.10 and 347,653.80

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Solution

The fourth proportional to 487,621.80, 730,007.10 and 347,653.80 is: 520,464.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,621.80 : 730,007.10 = 347,653.80 : x
  2. Step 2: Convert to fraction form
    487,621.80/730,007.10 = 347,653.80/x
  3. Step 3: Cross multiply
    487,621.80x = 730,007.10 × 347,653.80
  4. Step 4: Simplify right side
    487,621.80x = 253,789,742,341.98
  5. Step 5: Solve for x
    x = 253,789,742,341.98/487,621.80
  6. Step 6: Final answer
    x = 520,464.31

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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.