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Finding the Fourth Proportional to 390,167.10, 585,250.65 and 201,210.30

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Solution

The fourth proportional to 390,167.10, 585,250.65 and 201,210.30 is: 301,815.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,167.10 : 585,250.65 = 201,210.30 : x
  2. Step 2: Convert to fraction form
    390,167.10/585,250.65 = 201,210.30/x
  3. Step 3: Cross multiply
    390,167.10x = 585,250.65 × 201,210.30
  4. Step 4: Simplify right side
    390,167.10x = 117,758,458,861.70
  5. Step 5: Solve for x
    x = 117,758,458,861.70/390,167.10
  6. Step 6: Final answer
    x = 301,815.45

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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.