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Finding the Fourth Proportional to 661,643.76, 992,471.63 and 188,328.90

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Solution

The fourth proportional to 661,643.76, 992,471.63 and 188,328.90 is: 282,495.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,643.76 : 992,471.63 = 188,328.90 : x
  2. Step 2: Convert to fraction form
    661,643.76/992,471.63 = 188,328.90/x
  3. Step 3: Cross multiply
    661,643.76x = 992,471.63 × 188,328.90
  4. Step 4: Simplify right side
    661,643.76x = 186,911,089,417.46
  5. Step 5: Solve for x
    x = 186,911,089,417.46/661,643.76
  6. Step 6: Final answer
    x = 282,495.05

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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.