Home / 712,622.79-983,419.88-390,338.28

Finding the Fourth Proportional to 712,622.79, 983,419.88 and 390,338.28

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Solution

The fourth proportional to 712,622.79, 983,419.88 and 390,338.28 is: 538,667.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,622.79 : 983,419.88 = 390,338.28 : x
  2. Step 2: Convert to fraction form
    712,622.79/983,419.88 = 390,338.28/x
  3. Step 3: Cross multiply
    712,622.79x = 983,419.88 × 390,338.28
  4. Step 4: Simplify right side
    712,622.79x = 383,866,422,525.32
  5. Step 5: Solve for x
    x = 383,866,422,525.32/712,622.79
  6. Step 6: Final answer
    x = 538,667.06

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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.