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Finding the Fourth Proportional to 420,294.90, 630,374.66 and 120,707.34

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Solution

The fourth proportional to 420,294.90, 630,374.66 and 120,707.34 is: 181,041.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,294.90 : 630,374.66 = 120,707.34 : x
  2. Step 2: Convert to fraction form
    420,294.90/630,374.66 = 120,707.34/x
  3. Step 3: Cross multiply
    420,294.90x = 630,374.66 × 120,707.34
  4. Step 4: Simplify right side
    420,294.90x = 76,090,848,412.00
  5. Step 5: Solve for x
    x = 76,090,848,412.00/420,294.90
  6. Step 6: Final answer
    x = 181,041.57

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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.