Home / 687,776.40-1,031,664.60-404,341.20

Finding the Fourth Proportional to 687,776.40, 1,031,664.60 and 404,341.20

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Solution

The fourth proportional to 687,776.40, 1,031,664.60 and 404,341.20 is: 606,511.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,776.40 : 1,031,664.60 = 404,341.20 : x
  2. Step 2: Convert to fraction form
    687,776.40/1,031,664.60 = 404,341.20/x
  3. Step 3: Cross multiply
    687,776.40x = 1,031,664.60 × 404,341.20
  4. Step 4: Simplify right side
    687,776.40x = 417,144,502,361.52
  5. Step 5: Solve for x
    x = 417,144,502,361.52/687,776.40
  6. Step 6: Final answer
    x = 606,511.80

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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.