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Finding the Fourth Proportional to 210,230.80, 314,827.80 and 139,728.40

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Solution

The fourth proportional to 210,230.80, 314,827.80 and 139,728.40 is: 209,248.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,230.80 : 314,827.80 = 139,728.40 : x
  2. Step 2: Convert to fraction form
    210,230.80/314,827.80 = 139,728.40/x
  3. Step 3: Cross multiply
    210,230.80x = 314,827.80 × 139,728.40
  4. Step 4: Simplify right side
    210,230.80x = 43,990,384,769.52
  5. Step 5: Solve for x
    x = 43,990,384,769.52/210,230.80
  6. Step 6: Final answer
    x = 209,248.05

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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.