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Finding the Fourth Proportional to 525,871,915.20, 788,807,872.80 and 505,783,445.40

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Solution

The fourth proportional to 525,871,915.20, 788,807,872.80 and 505,783,445.40 is: 758,675,168.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,871,915.20 : 788,807,872.80 = 505,783,445.40 : x
  2. Step 2: Convert to fraction form
    525,871,915.20/788,807,872.80 = 505,783,445.40/x
  3. Step 3: Cross multiply
    525,871,915.20x = 788,807,872.80 × 505,783,445.40
  4. Step 4: Simplify right side
    525,871,915.20x = 398,965,963,663,428,928
  5. Step 5: Solve for x
    x = 398,965,963,663,428,928/525,871,915.20
  6. Step 6: Final answer
    x = 758,675,168.10

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1.5x scale

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.