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Finding the Fourth Proportional to 661,164.18, 912,402 and 359,358.18

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Solution

The fourth proportional to 661,164.18, 912,402 and 359,358.18 is: 495,911.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,164.18 : 912,402 = 359,358.18 : x
  2. Step 2: Convert to fraction form
    661,164.18/912,402 = 359,358.18/x
  3. Step 3: Cross multiply
    661,164.18x = 912,402 × 359,358.18
  4. Step 4: Simplify right side
    661,164.18x = 327,879,122,148.36
  5. Step 5: Solve for x
    x = 327,879,122,148.36/661,164.18
  6. Step 6: Final answer
    x = 495,911.81

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1.5x scale

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.