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Finding the Fourth Proportional to 604,328,681.70, 906,493,022.55 and 420,662,672.10

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Solution

The fourth proportional to 604,328,681.70, 906,493,022.55 and 420,662,672.10 is: 630,994,008.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,328,681.70 : 906,493,022.55 = 420,662,672.10 : x
  2. Step 2: Convert to fraction form
    604,328,681.70/906,493,022.55 = 420,662,672.10/x
  3. Step 3: Cross multiply
    604,328,681.70x = 906,493,022.55 × 420,662,672.10
  4. Step 4: Simplify right side
    604,328,681.70x = 381,327,777,105,888,576
  5. Step 5: Solve for x
    x = 381,327,777,105,888,576/604,328,681.70
  6. Step 6: Final answer
    x = 630,994,008.15

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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.