Home / 687,499.36-948,521.28-415,650.40

Finding the Fourth Proportional to 687,499.36, 948,521.28 and 415,650.40

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Solution

The fourth proportional to 687,499.36, 948,521.28 and 415,650.40 is: 573,459.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,499.36 : 948,521.28 = 415,650.40 : x
  2. Step 2: Convert to fraction form
    687,499.36/948,521.28 = 415,650.40/x
  3. Step 3: Cross multiply
    687,499.36x = 948,521.28 × 415,650.40
  4. Step 4: Simplify right side
    687,499.36x = 394,253,249,440.51
  5. Step 5: Solve for x
    x = 394,253,249,440.51/687,499.36
  6. Step 6: Final answer
    x = 573,459.81

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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.