Home / 687,450.28-948,795.41-400,970.36

Finding the Fourth Proportional to 687,450.28, 948,795.41 and 400,970.36

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Solution

The fourth proportional to 687,450.28, 948,795.41 and 400,970.36 is: 553,405.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,450.28 : 948,795.41 = 400,970.36 : x
  2. Step 2: Convert to fraction form
    687,450.28/948,795.41 = 400,970.36/x
  3. Step 3: Cross multiply
    687,450.28x = 948,795.41 × 400,970.36
  4. Step 4: Simplify right side
    687,450.28x = 380,438,837,114.05
  5. Step 5: Solve for x
    x = 380,438,837,114.05/687,450.28
  6. Step 6: Final answer
    x = 553,405.60

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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.