Home / 712,633.28-983,433.52-390,363.36

Finding the Fourth Proportional to 712,633.28, 983,433.52 and 390,363.36

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Solution

The fourth proportional to 712,633.28, 983,433.52 and 390,363.36 is: 538,701.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,633.28 : 983,433.52 = 390,363.36 : x
  2. Step 2: Convert to fraction form
    712,633.28/983,433.52 = 390,363.36/x
  3. Step 3: Cross multiply
    712,633.28x = 983,433.52 × 390,363.36
  4. Step 4: Simplify right side
    712,633.28x = 383,896,413,203.83
  5. Step 5: Solve for x
    x = 383,896,413,203.83/712,633.28
  6. Step 6: Final answer
    x = 538,701.21

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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.