Home / 900,403.64-1,242,419.10-518,356.60

Finding the Fourth Proportional to 900,403.64, 1,242,419.10 and 518,356.60

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Solution

The fourth proportional to 900,403.64, 1,242,419.10 and 518,356.60 is: 715,252.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    900,403.64 : 1,242,419.10 = 518,356.60 : x
  2. Step 2: Convert to fraction form
    900,403.64/1,242,419.10 = 518,356.60/x
  3. Step 3: Cross multiply
    900,403.64x = 1,242,419.10 × 518,356.60
  4. Step 4: Simplify right side
    900,403.64x = 644,016,140,451.06
  5. Step 5: Solve for x
    x = 644,016,140,451.06/900,403.64
  6. Step 6: Final answer
    x = 715,252.71

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1.5x scale

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.