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Finding the Fourth Proportional to 702,707,338.95, 969,736,138.19 and 389,461,731.07

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Solution

The fourth proportional to 702,707,338.95, 969,736,138.19 and 389,461,731.07 is: 537,457,194.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,707,338.95 : 969,736,138.19 = 389,461,731.07 : x
  2. Step 2: Convert to fraction form
    702,707,338.95/969,736,138.19 = 389,461,731.07/x
  3. Step 3: Cross multiply
    702,707,338.95x = 969,736,138.19 × 389,461,731.07
  4. Step 4: Simplify right side
    702,707,338.95x = 377,675,115,059,506,688
  5. Step 5: Solve for x
    x = 377,675,115,059,506,688/702,707,338.95
  6. Step 6: Final answer
    x = 537,457,194.66

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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.