Home / 861,277,010.40-1,291,915,515.60-402,111,986.40

Finding the Fourth Proportional to 861,277,010.40, 1,291,915,515.60 and 402,111,986.40

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Solution

The fourth proportional to 861,277,010.40, 1,291,915,515.60 and 402,111,986.40 is: 603,167,979.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,277,010.40 : 1,291,915,515.60 = 402,111,986.40 : x
  2. Step 2: Convert to fraction form
    861,277,010.40/1,291,915,515.60 = 402,111,986.40/x
  3. Step 3: Cross multiply
    861,277,010.40x = 1,291,915,515.60 × 402,111,986.40
  4. Step 4: Simplify right side
    861,277,010.40x = 519,494,714,238,896,128
  5. Step 5: Solve for x
    x = 519,494,714,238,896,128/861,277,010.40
  6. Step 6: Final answer
    x = 603,167,979.60

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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.