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Finding the Fourth Proportional to 286,570.10, 429,855.15 and 220,138.10

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Solution

The fourth proportional to 286,570.10, 429,855.15 and 220,138.10 is: 330,207.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,570.10 : 429,855.15 = 220,138.10 : x
  2. Step 2: Convert to fraction form
    286,570.10/429,855.15 = 220,138.10/x
  3. Step 3: Cross multiply
    286,570.10x = 429,855.15 × 220,138.10
  4. Step 4: Simplify right side
    286,570.10x = 94,627,495,996.22
  5. Step 5: Solve for x
    x = 94,627,495,996.22/286,570.10
  6. Step 6: Final answer
    x = 330,207.15

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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.