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Finding the Fourth Proportional to 903,521,919.60, 1,355,254,885.80 and 257,289,663.60

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Solution

The fourth proportional to 903,521,919.60, 1,355,254,885.80 and 257,289,663.60 is: 385,926,523.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    903,521,919.60 : 1,355,254,885.80 = 257,289,663.60 : x
  2. Step 2: Convert to fraction form
    903,521,919.60/1,355,254,885.80 = 257,289,663.60/x
  3. Step 3: Cross multiply
    903,521,919.60x = 1,355,254,885.80 × 257,289,663.60
  4. Step 4: Simplify right side
    903,521,919.60x = 348,693,073,659,738,368
  5. Step 5: Solve for x
    x = 348,693,073,659,738,368/903,521,919.60
  6. Step 6: Final answer
    x = 385,926,523.86

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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.