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Finding the Fourth Proportional to 489,672,672.40, 734,509,008.60 and 425,899,752.40

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Solution

The fourth proportional to 489,672,672.40, 734,509,008.60 and 425,899,752.40 is: 638,849,628.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,672,672.40 : 734,509,008.60 = 425,899,752.40 : x
  2. Step 2: Convert to fraction form
    489,672,672.40/734,509,008.60 = 425,899,752.40/x
  3. Step 3: Cross multiply
    489,672,672.40x = 734,509,008.60 × 425,899,752.40
  4. Step 4: Simplify right side
    489,672,672.40x = 312,827,204,898,309,440
  5. Step 5: Solve for x
    x = 312,827,204,898,309,440/489,672,672.40
  6. Step 6: Final answer
    x = 638,849,628.60

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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.