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Finding the Fourth Proportional to 662,671.68, 914,365.44 and 390,824.64

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Solution

The fourth proportional to 662,671.68, 914,365.44 and 390,824.64 is: 539,266.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,671.68 : 914,365.44 = 390,824.64 : x
  2. Step 2: Convert to fraction form
    662,671.68/914,365.44 = 390,824.64/x
  3. Step 3: Cross multiply
    662,671.68x = 914,365.44 × 390,824.64
  4. Step 4: Simplify right side
    662,671.68x = 357,356,543,916.44
  5. Step 5: Solve for x
    x = 357,356,543,916.44/662,671.68
  6. Step 6: Final answer
    x = 539,266.36

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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.