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Finding the Fourth Proportional to 210,320.80, 314,962.80 and 139,818.40

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Solution

The fourth proportional to 210,320.80, 314,962.80 and 139,818.40 is: 209,382.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,320.80 : 314,962.80 = 139,818.40 : x
  2. Step 2: Convert to fraction form
    210,320.80/314,962.80 = 139,818.40/x
  3. Step 3: Cross multiply
    210,320.80x = 314,962.80 × 139,818.40
  4. Step 4: Simplify right side
    210,320.80x = 44,037,594,755.52
  5. Step 5: Solve for x
    x = 44,037,594,755.52/210,320.80
  6. Step 6: Final answer
    x = 209,382.97

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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.