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Finding the Fourth Proportional to 636,656,130.90, 878,579,259.93 and 354,394,096.02

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Solution

The fourth proportional to 636,656,130.90, 878,579,259.93 and 354,394,096.02 is: 489,060,400.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,656,130.90 : 878,579,259.93 = 354,394,096.02 : x
  2. Step 2: Convert to fraction form
    636,656,130.90/878,579,259.93 = 354,394,096.02/x
  3. Step 3: Cross multiply
    636,656,130.90x = 878,579,259.93 × 354,394,096.02
  4. Step 4: Simplify right side
    636,656,130.90x = 311,363,302,604,812,928
  5. Step 5: Solve for x
    x = 311,363,302,604,812,928/636,656,130.90
  6. Step 6: Final answer
    x = 489,060,400.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.