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Finding the Fourth Proportional to 286,614.40, 429,921.60 and 86,925.10

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Solution

The fourth proportional to 286,614.40, 429,921.60 and 86,925.10 is: 130,387.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,614.40 : 429,921.60 = 86,925.10 : x
  2. Step 2: Convert to fraction form
    286,614.40/429,921.60 = 86,925.10/x
  3. Step 3: Cross multiply
    286,614.40x = 429,921.60 × 86,925.10
  4. Step 4: Simplify right side
    286,614.40x = 37,370,978,072.16
  5. Step 5: Solve for x
    x = 37,370,978,072.16/286,614.40
  6. Step 6: Final answer
    x = 130,387.65

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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.