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Finding the Fourth Proportional to 420,295.20, 630,482.40 and 167,514.72

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Solution

The fourth proportional to 420,295.20, 630,482.40 and 167,514.72 is: 251,287.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,295.20 : 630,482.40 = 167,514.72 : x
  2. Step 2: Convert to fraction form
    420,295.20/630,482.40 = 167,514.72/x
  3. Step 3: Cross multiply
    420,295.20x = 630,482.40 × 167,514.72
  4. Step 4: Simplify right side
    420,295.20x = 105,615,082,700.93
  5. Step 5: Solve for x
    x = 105,615,082,700.93/420,295.20
  6. Step 6: Final answer
    x = 251,287.86

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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.