Home / 519,311,987.40-779,113,610.77-208,637,762.54

Finding the Fourth Proportional to 519,311,987.40, 779,113,610.77 and 208,637,762.54

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Solution

The fourth proportional to 519,311,987.40, 779,113,610.77 and 208,637,762.54 is: 313,015,151.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,311,987.40 : 779,113,610.77 = 208,637,762.54 : x
  2. Step 2: Convert to fraction form
    519,311,987.40/779,113,610.77 = 208,637,762.54/x
  3. Step 3: Cross multiply
    519,311,987.40x = 779,113,610.77 × 208,637,762.54
  4. Step 4: Simplify right side
    519,311,987.40x = 162,552,520,515,513,248
  5. Step 5: Solve for x
    x = 162,552,520,515,513,248/519,311,987.40
  6. Step 6: Final answer
    x = 313,015,151.70

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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.