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Finding the Fourth Proportional to 439,207, 658,810.50 and 139,688.20

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Solution

The fourth proportional to 439,207, 658,810.50 and 139,688.20 is: 209,532.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,207 : 658,810.50 = 139,688.20 : x
  2. Step 2: Convert to fraction form
    439,207/658,810.50 = 139,688.20/x
  3. Step 3: Cross multiply
    439,207x = 658,810.50 × 139,688.20
  4. Step 4: Simplify right side
    439,207x = 92,028,052,886.10
  5. Step 5: Solve for x
    x = 92,028,052,886.10/439,207
  6. Step 6: Final answer
    x = 209,532.30

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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.