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Finding the Fourth Proportional to 287,710.20, 432,018.90 and 169,471.80

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Solution

The fourth proportional to 287,710.20, 432,018.90 and 169,471.80 is: 254,474.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,710.20 : 432,018.90 = 169,471.80 : x
  2. Step 2: Convert to fraction form
    287,710.20/432,018.90 = 169,471.80/x
  3. Step 3: Cross multiply
    287,710.20x = 432,018.90 × 169,471.80
  4. Step 4: Simplify right side
    287,710.20x = 73,215,020,617.02
  5. Step 5: Solve for x
    x = 73,215,020,617.02/287,710.20
  6. Step 6: Final answer
    x = 254,474.89

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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.