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Finding the Fourth Proportional to 398,672,280.90, 598,008,421.35 and 398,672,280.90

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Solution

The fourth proportional to 398,672,280.90, 598,008,421.35 and 398,672,280.90 is: 598,008,421.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,672,280.90 : 598,008,421.35 = 398,672,280.90 : x
  2. Step 2: Convert to fraction form
    398,672,280.90/598,008,421.35 = 398,672,280.90/x
  3. Step 3: Cross multiply
    398,672,280.90x = 598,008,421.35 × 398,672,280.90
  4. Step 4: Simplify right side
    398,672,280.90x = 238,409,381,337,012,768
  5. Step 5: Solve for x
    x = 238,409,381,337,012,768/398,672,280.90
  6. Step 6: Final answer
    x = 598,008,421.35

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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.