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Finding the Fourth Proportional to 912,398,916.80, 1,365,910,989.60 and 859,248,401.60

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Solution

The fourth proportional to 912,398,916.80, 1,365,910,989.60 and 859,248,401.60 is: 1,286,341,766.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,398,916.80 : 1,365,910,989.60 = 859,248,401.60 : x
  2. Step 2: Convert to fraction form
    912,398,916.80/1,365,910,989.60 = 859,248,401.60/x
  3. Step 3: Cross multiply
    912,398,916.80x = 1,365,910,989.60 × 859,248,401.60
  4. Step 4: Simplify right side
    912,398,916.80x = 1,173,656,834,541,674,240
  5. Step 5: Solve for x
    x = 1,173,656,834,541,674,240/912,398,916.80
  6. Step 6: Final answer
    x = 1,286,341,766.67

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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.