Home / 663,921,804.80-995,210,860.80-391,152,166.40

Finding the Fourth Proportional to 663,921,804.80, 995,210,860.80 and 391,152,166.40

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Solution

The fourth proportional to 663,921,804.80, 995,210,860.80 and 391,152,166.40 is: 586,332,428.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,921,804.80 : 995,210,860.80 = 391,152,166.40 : x
  2. Step 2: Convert to fraction form
    663,921,804.80/995,210,860.80 = 391,152,166.40/x
  3. Step 3: Cross multiply
    663,921,804.80x = 995,210,860.80 × 391,152,166.40
  4. Step 4: Simplify right side
    663,921,804.80x = 389,278,884,226,728,768
  5. Step 5: Solve for x
    x = 389,278,884,226,728,768/663,921,804.80
  6. Step 6: Final answer
    x = 586,332,428.63

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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.