Home / 712,630.20-983,429.46-390,360.36

Finding the Fourth Proportional to 712,630.20, 983,429.46 and 390,360.36

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Solution

The fourth proportional to 712,630.20, 983,429.46 and 390,360.36 is: 538,697.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,630.20 : 983,429.46 = 390,360.36 : x
  2. Step 2: Convert to fraction form
    712,630.20/983,429.46 = 390,360.36/x
  3. Step 3: Cross multiply
    712,630.20x = 983,429.46 × 390,360.36
  4. Step 4: Simplify right side
    712,630.20x = 383,891,878,040.21
  5. Step 5: Solve for x
    x = 383,891,878,040.21/712,630.20
  6. Step 6: Final answer
    x = 538,697.18

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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.