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Finding the Fourth Proportional to 547,287.70, 820,931.55 and 472,492.30

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Solution

The fourth proportional to 547,287.70, 820,931.55 and 472,492.30 is: 708,738.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,287.70 : 820,931.55 = 472,492.30 : x
  2. Step 2: Convert to fraction form
    547,287.70/820,931.55 = 472,492.30/x
  3. Step 3: Cross multiply
    547,287.70x = 820,931.55 × 472,492.30
  4. Step 4: Simplify right side
    547,287.70x = 387,883,836,202.07
  5. Step 5: Solve for x
    x = 387,883,836,202.07/547,287.70
  6. Step 6: Final answer
    x = 708,738.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.