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Finding the Fourth Proportional to 660,441.76, 911,401.60 and 358,637.92

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Solution

The fourth proportional to 660,441.76, 911,401.60 and 358,637.92 is: 494,915.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,441.76 : 911,401.60 = 358,637.92 : x
  2. Step 2: Convert to fraction form
    660,441.76/911,401.60 = 358,637.92/x
  3. Step 3: Cross multiply
    660,441.76x = 911,401.60 × 358,637.92
  4. Step 4: Simplify right side
    660,441.76x = 326,863,174,108.67
  5. Step 5: Solve for x
    x = 326,863,174,108.67/660,441.76
  6. Step 6: Final answer
    x = 494,915.97

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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.