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Finding the Fourth Proportional to 264,459.60, 396,721.80 and 86,918.40

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Solution

The fourth proportional to 264,459.60, 396,721.80 and 86,918.40 is: 130,388.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    264,459.60 : 396,721.80 = 86,918.40 : x
  2. Step 2: Convert to fraction form
    264,459.60/396,721.80 = 86,918.40/x
  3. Step 3: Cross multiply
    264,459.60x = 396,721.80 × 86,918.40
  4. Step 4: Simplify right side
    264,459.60x = 34,482,424,101.12
  5. Step 5: Solve for x
    x = 34,482,424,101.12/264,459.60
  6. Step 6: Final answer
    x = 130,388.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.