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Finding the Fourth Proportional to 286,645.40, 429,968.10 and 73,412.90

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Solution

The fourth proportional to 286,645.40, 429,968.10 and 73,412.90 is: 110,119.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,645.40 : 429,968.10 = 73,412.90 : x
  2. Step 2: Convert to fraction form
    286,645.40/429,968.10 = 73,412.90/x
  3. Step 3: Cross multiply
    286,645.40x = 429,968.10 × 73,412.90
  4. Step 4: Simplify right side
    286,645.40x = 31,565,205,128.49
  5. Step 5: Solve for x
    x = 31,565,205,128.49/286,645.40
  6. Step 6: Final answer
    x = 110,119.35

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Similar ratio
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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.