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Finding the Fourth Proportional to 628,938.84, 867,949.85 and 356,981.30

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Solution

The fourth proportional to 628,938.84, 867,949.85 and 356,981.30 is: 492,642.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,938.84 : 867,949.85 = 356,981.30 : x
  2. Step 2: Convert to fraction form
    628,938.84/867,949.85 = 356,981.30/x
  3. Step 3: Cross multiply
    628,938.84x = 867,949.85 × 356,981.30
  4. Step 4: Simplify right side
    628,938.84x = 309,841,865,595.32
  5. Step 5: Solve for x
    x = 309,841,865,595.32/628,938.84
  6. Step 6: Final answer
    x = 492,642.28

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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.