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Finding the Fourth Proportional to 349,939.40, 525,038.70 and 139,728.20

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Solution

The fourth proportional to 349,939.40, 525,038.70 and 139,728.20 is: 209,644.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    349,939.40 : 525,038.70 = 139,728.20 : x
  2. Step 2: Convert to fraction form
    349,939.40/525,038.70 = 139,728.20/x
  3. Step 3: Cross multiply
    349,939.40x = 525,038.70 × 139,728.20
  4. Step 4: Simplify right side
    349,939.40x = 73,362,712,481.34
  5. Step 5: Solve for x
    x = 73,362,712,481.34/349,939.40
  6. Step 6: Final answer
    x = 209,644.05

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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.