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Finding the Fourth Proportional to 310,487.58, 428,222.25 and 208,482.30

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Solution

The fourth proportional to 310,487.58, 428,222.25 and 208,482.30 is: 287,537.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,487.58 : 428,222.25 = 208,482.30 : x
  2. Step 2: Convert to fraction form
    310,487.58/428,222.25 = 208,482.30/x
  3. Step 3: Cross multiply
    310,487.58x = 428,222.25 × 208,482.30
  4. Step 4: Simplify right side
    310,487.58x = 89,276,759,591.18
  5. Step 5: Solve for x
    x = 89,276,759,591.18/310,487.58
  6. Step 6: Final answer
    x = 287,537.30

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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.