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Finding the Fourth Proportional to 309,888.35, 427,627.95 and 173,909.60

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Solution

The fourth proportional to 309,888.35, 427,627.95 and 173,909.60 is: 239,985.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,888.35 : 427,627.95 = 173,909.60 : x
  2. Step 2: Convert to fraction form
    309,888.35/427,627.95 = 173,909.60/x
  3. Step 3: Cross multiply
    309,888.35x = 427,627.95 × 173,909.60
  4. Step 4: Simplify right side
    309,888.35x = 74,368,605,316.41
  5. Step 5: Solve for x
    x = 74,368,605,316.41/309,888.35
  6. Step 6: Final answer
    x = 239,985.16

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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.