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Finding the Fourth Proportional to 661,162.16, 912,409.80 and 359,356.88

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Solution

The fourth proportional to 661,162.16, 912,409.80 and 359,356.88 is: 495,915.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,162.16 : 912,409.80 = 359,356.88 : x
  2. Step 2: Convert to fraction form
    661,162.16/912,409.80 = 359,356.88/x
  3. Step 3: Cross multiply
    661,162.16x = 912,409.80 × 359,356.88
  4. Step 4: Simplify right side
    661,162.16x = 327,880,739,009.42
  5. Step 5: Solve for x
    x = 327,880,739,009.42/661,162.16
  6. Step 6: Final answer
    x = 495,915.77

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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.