Home / 1,392,176,779.84-1,921,165,617.64-765,645,435.40

Finding the Fourth Proportional to 1,392,176,779.84, 1,921,165,617.64 and 765,645,435.40

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Solution

The fourth proportional to 1,392,176,779.84, 1,921,165,617.64 and 765,645,435.40 is: 1,056,569,616.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,176,779.84 : 1,921,165,617.64 = 765,645,435.40 : x
  2. Step 2: Convert to fraction form
    1,392,176,779.84/1,921,165,617.64 = 765,645,435.40/x
  3. Step 3: Cross multiply
    1,392,176,779.84x = 1,921,165,617.64 × 765,645,435.40
  4. Step 4: Simplify right side
    1,392,176,779.84x = 1,470,931,685,793,487,872
  5. Step 5: Solve for x
    x = 1,470,931,685,793,487,872/1,392,176,779.84
  6. Step 6: Final answer
    x = 1,056,569,616.08

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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.