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Finding the Fourth Proportional to 660,864.40, 911,981.64 and 359,056.24

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Solution

The fourth proportional to 660,864.40, 911,981.64 and 359,056.24 is: 495,491.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,864.40 : 911,981.64 = 359,056.24 : x
  2. Step 2: Convert to fraction form
    660,864.40/911,981.64 = 359,056.24/x
  3. Step 3: Cross multiply
    660,864.40x = 911,981.64 × 359,056.24
  4. Step 4: Simplify right side
    660,864.40x = 327,452,698,607.43
  5. Step 5: Solve for x
    x = 327,452,698,607.43/660,864.40
  6. Step 6: Final answer
    x = 495,491.51

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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.