Home / 420,319.90-630,664.83-220,592.13

Finding the Fourth Proportional to 420,319.90, 630,664.83 and 220,592.13

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Solution

The fourth proportional to 420,319.90, 630,664.83 and 220,592.13 is: 330,985.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,319.90 : 630,664.83 = 220,592.13 : x
  2. Step 2: Convert to fraction form
    420,319.90/630,664.83 = 220,592.13/x
  3. Step 3: Cross multiply
    420,319.90x = 630,664.83 × 220,592.13
  4. Step 4: Simplify right side
    420,319.90x = 139,119,698,165.79
  5. Step 5: Solve for x
    x = 139,119,698,165.79/420,319.90
  6. Step 6: Final answer
    x = 330,985.28

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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.