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Finding the Fourth Proportional to 420,746.40, 630,925.20 and 183,967.20

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Solution

The fourth proportional to 420,746.40, 630,925.20 and 183,967.20 is: 275,865.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,746.40 : 630,925.20 = 183,967.20 : x
  2. Step 2: Convert to fraction form
    420,746.40/630,925.20 = 183,967.20/x
  3. Step 3: Cross multiply
    420,746.40x = 630,925.20 × 183,967.20
  4. Step 4: Simplify right side
    420,746.40x = 116,069,542,453.44
  5. Step 5: Solve for x
    x = 116,069,542,453.44/420,746.40
  6. Step 6: Final answer
    x = 275,865.80

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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.