Home / 712,722.32-983,556.96-390,444.02

Finding the Fourth Proportional to 712,722.32, 983,556.96 and 390,444.02

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Solution

The fourth proportional to 712,722.32, 983,556.96 and 390,444.02 is: 538,812.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,722.32 : 983,556.96 = 390,444.02 : x
  2. Step 2: Convert to fraction form
    712,722.32/983,556.96 = 390,444.02/x
  3. Step 3: Cross multiply
    712,722.32x = 983,556.96 × 390,444.02
  4. Step 4: Simplify right side
    712,722.32x = 384,023,933,361.38
  5. Step 5: Solve for x
    x = 384,023,933,361.38/712,722.32
  6. Step 6: Final answer
    x = 538,812.83

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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.