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Finding the Fourth Proportional to 863,138,621.20, 1,294,707,931.80 and 784,060,200.40

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Solution

The fourth proportional to 863,138,621.20, 1,294,707,931.80 and 784,060,200.40 is: 1,176,090,300.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    863,138,621.20 : 1,294,707,931.80 = 784,060,200.40 : x
  2. Step 2: Convert to fraction form
    863,138,621.20/1,294,707,931.80 = 784,060,200.40/x
  3. Step 3: Cross multiply
    863,138,621.20x = 1,294,707,931.80 × 784,060,200.40
  4. Step 4: Simplify right side
    863,138,621.20x = 1,015,128,960,466,577,408
  5. Step 5: Solve for x
    x = 1,015,128,960,466,577,408/863,138,621.20
  6. Step 6: Final answer
    x = 1,176,090,300.60

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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.