Home / 420,442.32-630,288.36-154,140.66

Finding the Fourth Proportional to 420,442.32, 630,288.36 and 154,140.66

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Solution

The fourth proportional to 420,442.32, 630,288.36 and 154,140.66 is: 231,073.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,442.32 : 630,288.36 = 154,140.66 : x
  2. Step 2: Convert to fraction form
    420,442.32/630,288.36 = 154,140.66/x
  3. Step 3: Cross multiply
    420,442.32x = 630,288.36 × 154,140.66
  4. Step 4: Simplify right side
    420,442.32x = 97,153,063,800.72
  5. Step 5: Solve for x
    x = 97,153,063,800.72/420,442.32
  6. Step 6: Final answer
    x = 231,073.47

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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.