Home / 420,207.02-630,316.02-139,724.30

Finding the Fourth Proportional to 420,207.02, 630,316.02 and 139,724.30

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Solution

The fourth proportional to 420,207.02, 630,316.02 and 139,724.30 is: 209,588.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,207.02 : 630,316.02 = 139,724.30 : x
  2. Step 2: Convert to fraction form
    420,207.02/630,316.02 = 139,724.30/x
  3. Step 3: Cross multiply
    420,207.02x = 630,316.02 × 139,724.30
  4. Step 4: Simplify right side
    420,207.02x = 88,070,464,673.29
  5. Step 5: Solve for x
    x = 88,070,464,673.29/420,207.02
  6. Step 6: Final answer
    x = 209,588.28

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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.