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Finding the Fourth Proportional to 660,960, 912,124.80 and 359,154

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Solution

The fourth proportional to 660,960, 912,124.80 and 359,154 is: 495,632.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,960 : 912,124.80 = 359,154 : x
  2. Step 2: Convert to fraction form
    660,960/912,124.80 = 359,154/x
  3. Step 3: Cross multiply
    660,960x = 912,124.80 × 359,154
  4. Step 4: Simplify right side
    660,960x = 327,593,270,419.20
  5. Step 5: Solve for x
    x = 327,593,270,419.20/660,960
  6. Step 6: Final answer
    x = 495,632.52

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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.