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Finding the Fourth Proportional to 610,946.80, 916,420.20 and 161,666.80

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Solution

The fourth proportional to 610,946.80, 916,420.20 and 161,666.80 is: 242,500.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,946.80 : 916,420.20 = 161,666.80 : x
  2. Step 2: Convert to fraction form
    610,946.80/916,420.20 = 161,666.80/x
  3. Step 3: Cross multiply
    610,946.80x = 916,420.20 × 161,666.80
  4. Step 4: Simplify right side
    610,946.80x = 148,154,721,189.36
  5. Step 5: Solve for x
    x = 148,154,721,189.36/610,946.80
  6. Step 6: Final answer
    x = 242,500.20

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Similar ratio
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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.