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Finding the Fourth Proportional to 644,602,499.91, 966,902,543.76 and 201,979,064.88

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Solution

The fourth proportional to 644,602,499.91, 966,902,543.76 and 201,979,064.88 is: 302,968,219.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,602,499.91 : 966,902,543.76 = 201,979,064.88 : x
  2. Step 2: Convert to fraction form
    644,602,499.91/966,902,543.76 = 201,979,064.88/x
  3. Step 3: Cross multiply
    644,602,499.91x = 966,902,543.76 × 201,979,064.88
  4. Step 4: Simplify right side
    644,602,499.91x = 195,294,071,618,738,080
  5. Step 5: Solve for x
    x = 195,294,071,618,738,080/644,602,499.91
  6. Step 6: Final answer
    x = 302,968,219.40

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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.