Home / 387,352,985.28-534,539,141.64-211,139,455.20

Finding the Fourth Proportional to 387,352,985.28, 534,539,141.64 and 211,139,455.20

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Solution

The fourth proportional to 387,352,985.28, 534,539,141.64 and 211,139,455.20 is: 291,368,099.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,352,985.28 : 534,539,141.64 = 211,139,455.20 : x
  2. Step 2: Convert to fraction form
    387,352,985.28/534,539,141.64 = 211,139,455.20/x
  3. Step 3: Cross multiply
    387,352,985.28x = 534,539,141.64 × 211,139,455.20
  4. Step 4: Simplify right side
    387,352,985.28x = 112,862,303,148,945,232
  5. Step 5: Solve for x
    x = 112,862,303,148,945,232/387,352,985.28
  6. Step 6: Final answer
    x = 291,368,099.48

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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.