Home / 318,813,720.40-439,949,340.64-177,677,430.76

Finding the Fourth Proportional to 318,813,720.40, 439,949,340.64 and 177,677,430.76

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Solution

The fourth proportional to 318,813,720.40, 439,949,340.64 and 177,677,430.76 is: 245,187,278.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,813,720.40 : 439,949,340.64 = 177,677,430.76 : x
  2. Step 2: Convert to fraction form
    318,813,720.40/439,949,340.64 = 177,677,430.76/x
  3. Step 3: Cross multiply
    318,813,720.40x = 439,949,340.64 × 177,677,430.76
  4. Step 4: Simplify right side
    318,813,720.40x = 78,169,068,509,471,248
  5. Step 5: Solve for x
    x = 78,169,068,509,471,248/318,813,720.40
  6. Step 6: Final answer
    x = 245,187,278.68

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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.