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Finding the Fourth Proportional to 638,359.61, 880,936.40 and 351,886.01

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Solution

The fourth proportional to 638,359.61, 880,936.40 and 351,886.01 is: 485,602.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,359.61 : 880,936.40 = 351,886.01 : x
  2. Step 2: Convert to fraction form
    638,359.61/880,936.40 = 351,886.01/x
  3. Step 3: Cross multiply
    638,359.61x = 880,936.40 × 351,886.01
  4. Step 4: Simplify right side
    638,359.61x = 309,989,191,334.80
  5. Step 5: Solve for x
    x = 309,989,191,334.80/638,359.61
  6. Step 6: Final answer
    x = 485,602.77

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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.