Home / 858,165,787.20-1,287,248,680.80-514,180,430.40

Finding the Fourth Proportional to 858,165,787.20, 1,287,248,680.80 and 514,180,430.40

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Solution

The fourth proportional to 858,165,787.20, 1,287,248,680.80 and 514,180,430.40 is: 771,270,645.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,165,787.20 : 1,287,248,680.80 = 514,180,430.40 : x
  2. Step 2: Convert to fraction form
    858,165,787.20/1,287,248,680.80 = 514,180,430.40/x
  3. Step 3: Cross multiply
    858,165,787.20x = 1,287,248,680.80 × 514,180,430.40
  4. Step 4: Simplify right side
    858,165,787.20x = 661,878,080,725,576,192
  5. Step 5: Solve for x
    x = 661,878,080,725,576,192/858,165,787.20
  6. Step 6: Final answer
    x = 771,270,645.60

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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.