Home / 638,594.24-881,277.80-390,276.42

Finding the Fourth Proportional to 638,594.24, 881,277.80 and 390,276.42

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Solution

The fourth proportional to 638,594.24, 881,277.80 and 390,276.42 is: 538,592.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,594.24 : 881,277.80 = 390,276.42 : x
  2. Step 2: Convert to fraction form
    638,594.24/881,277.80 = 390,276.42/x
  3. Step 3: Cross multiply
    638,594.24x = 881,277.80 × 390,276.42
  4. Step 4: Simplify right side
    638,594.24x = 343,941,942,858.09
  5. Step 5: Solve for x
    x = 343,941,942,858.09/638,594.24
  6. Step 6: Final answer
    x = 538,592.30

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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.