Home / 712,330.11-983,015.40-390,040.14

Finding the Fourth Proportional to 712,330.11, 983,015.40 and 390,040.14

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Solution

The fourth proportional to 712,330.11, 983,015.40 and 390,040.14 is: 538,255.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,330.11 : 983,015.40 = 390,040.14 : x
  2. Step 2: Convert to fraction form
    712,330.11/983,015.40 = 390,040.14/x
  3. Step 3: Cross multiply
    712,330.11x = 983,015.40 × 390,040.14
  4. Step 4: Simplify right side
    712,330.11x = 383,415,464,238.16
  5. Step 5: Solve for x
    x = 383,415,464,238.16/712,330.11
  6. Step 6: Final answer
    x = 538,255.31

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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.