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Finding the Fourth Proportional to 553,323.81, 761,978.90 and 480,693.54

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Solution

The fourth proportional to 553,323.81, 761,978.90 and 480,693.54 is: 661,960.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,323.81 : 761,978.90 = 480,693.54 : x
  2. Step 2: Convert to fraction form
    553,323.81/761,978.90 = 480,693.54/x
  3. Step 3: Cross multiply
    553,323.81x = 761,978.90 × 480,693.54
  4. Step 4: Simplify right side
    553,323.81x = 366,278,336,048.04
  5. Step 5: Solve for x
    x = 366,278,336,048.04/553,323.81
  6. Step 6: Final answer
    x = 661,960.19

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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.