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Finding the Fourth Proportional to 420,030.60, 630,045.90 and 354,420.60

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Solution

The fourth proportional to 420,030.60, 630,045.90 and 354,420.60 is: 531,630.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,030.60 : 630,045.90 = 354,420.60 : x
  2. Step 2: Convert to fraction form
    420,030.60/630,045.90 = 354,420.60/x
  3. Step 3: Cross multiply
    420,030.60x = 630,045.90 × 354,420.60
  4. Step 4: Simplify right side
    420,030.60x = 223,301,245,905.54
  5. Step 5: Solve for x
    x = 223,301,245,905.54/420,030.60
  6. Step 6: Final answer
    x = 531,630.90

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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.