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Finding the Fourth Proportional to 978,961,076.76, 1,350,924,907.50 and 532,915,155.48

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Solution

The fourth proportional to 978,961,076.76, 1,350,924,907.50 and 532,915,155.48 is: 735,400,389.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,961,076.76 : 1,350,924,907.50 = 532,915,155.48 : x
  2. Step 2: Convert to fraction form
    978,961,076.76/1,350,924,907.50 = 532,915,155.48/x
  3. Step 3: Cross multiply
    978,961,076.76x = 1,350,924,907.50 × 532,915,155.48
  4. Step 4: Simplify right side
    978,961,076.76x = 719,928,357,122,167,168
  5. Step 5: Solve for x
    x = 719,928,357,122,167,168/978,961,076.76
  6. Step 6: Final answer
    x = 735,400,389.47

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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.