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Finding the Fourth Proportional to 420,729.40, 630,899.70 and 183,950.20

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Solution

The fourth proportional to 420,729.40, 630,899.70 and 183,950.20 is: 275,840.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,729.40 : 630,899.70 = 183,950.20 : x
  2. Step 2: Convert to fraction form
    420,729.40/630,899.70 = 183,950.20/x
  3. Step 3: Cross multiply
    420,729.40x = 630,899.70 × 183,950.20
  4. Step 4: Simplify right side
    420,729.40x = 116,054,125,994.94
  5. Step 5: Solve for x
    x = 116,054,125,994.94/420,729.40
  6. Step 6: Final answer
    x = 275,840.30

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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.