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Finding the Fourth Proportional to 611,279.29, 916,875.63 and 161,990.20

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Solution

The fourth proportional to 611,279.29, 916,875.63 and 161,990.20 is: 242,973.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,279.29 : 916,875.63 = 161,990.20 : x
  2. Step 2: Convert to fraction form
    611,279.29/916,875.63 = 161,990.20/x
  3. Step 3: Cross multiply
    611,279.29x = 916,875.63 × 161,990.20
  4. Step 4: Simplify right side
    611,279.29x = 148,524,866,678.83
  5. Step 5: Solve for x
    x = 148,524,866,678.83/611,279.29
  6. Step 6: Final answer
    x = 242,973.82

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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.