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Finding the Fourth Proportional to 648,686.49, 895,182 and 354,336.45

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Solution

The fourth proportional to 648,686.49, 895,182 and 354,336.45 is: 488,981.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,686.49 : 895,182 = 354,336.45 : x
  2. Step 2: Convert to fraction form
    648,686.49/895,182 = 354,336.45/x
  3. Step 3: Cross multiply
    648,686.49x = 895,182 × 354,336.45
  4. Step 4: Simplify right side
    648,686.49x = 317,195,611,983.90
  5. Step 5: Solve for x
    x = 317,195,611,983.90/648,686.49
  6. Step 6: Final answer
    x = 488,981.38

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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.