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Finding the Fourth Proportional to 987,734,667.60, 1,481,602,001.40 and 620,402,648.40

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Solution

The fourth proportional to 987,734,667.60, 1,481,602,001.40 and 620,402,648.40 is: 930,603,972.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,734,667.60 : 1,481,602,001.40 = 620,402,648.40 : x
  2. Step 2: Convert to fraction form
    987,734,667.60/1,481,602,001.40 = 620,402,648.40/x
  3. Step 3: Cross multiply
    987,734,667.60x = 1,481,602,001.40 × 620,402,648.40
  4. Step 4: Simplify right side
    987,734,667.60x = 919,189,805,543,300,480
  5. Step 5: Solve for x
    x = 919,189,805,543,300,480/987,734,667.60
  6. Step 6: Final answer
    x = 930,603,972.60

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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.