Home / 661,464.15-991,875.25-387,985.06

Finding the Fourth Proportional to 661,464.15, 991,875.25 and 387,985.06

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Solution

The fourth proportional to 661,464.15, 991,875.25 and 387,985.06 is: 581,789.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,464.15 : 991,875.25 = 387,985.06 : x
  2. Step 2: Convert to fraction form
    661,464.15/991,875.25 = 387,985.06/x
  3. Step 3: Cross multiply
    661,464.15x = 991,875.25 × 387,985.06
  4. Step 4: Simplify right side
    661,464.15x = 384,832,778,383.77
  5. Step 5: Solve for x
    x = 384,832,778,383.77/661,464.15
  6. Step 6: Final answer
    x = 581,789.32

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1.5x scale

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.