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Finding the Fourth Proportional to 648,491.34, 888,429 and 624,240.78

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Solution

The fourth proportional to 648,491.34, 888,429 and 624,240.78 is: 855,205.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,491.34 : 888,429 = 624,240.78 : x
  2. Step 2: Convert to fraction form
    648,491.34/888,429 = 624,240.78/x
  3. Step 3: Cross multiply
    648,491.34x = 888,429 × 624,240.78
  4. Step 4: Simplify right side
    648,491.34x = 554,593,607,492.48
  5. Step 5: Solve for x
    x = 554,593,607,492.48/648,491.34
  6. Step 6: Final answer
    x = 855,205.88

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.