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Finding the Fourth Proportional to 420,360.51, 630,646.38 and 120,841.64

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Solution

The fourth proportional to 420,360.51, 630,646.38 and 120,841.64 is: 181,292.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,360.51 : 630,646.38 = 120,841.64 : x
  2. Step 2: Convert to fraction form
    420,360.51/630,646.38 = 120,841.64/x
  3. Step 3: Cross multiply
    420,360.51x = 630,646.38 × 120,841.64
  4. Step 4: Simplify right side
    420,360.51x = 76,208,342,030.96
  5. Step 5: Solve for x
    x = 76,208,342,030.96/420,360.51
  6. Step 6: Final answer
    x = 181,292.82

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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.