Home / 712,631.85-983,432.34-390,347.28

Finding the Fourth Proportional to 712,631.85, 983,432.34 and 390,347.28

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Solution

The fourth proportional to 712,631.85, 983,432.34 and 390,347.28 is: 538,679.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,631.85 : 983,432.34 = 390,347.28 : x
  2. Step 2: Convert to fraction form
    712,631.85/983,432.34 = 390,347.28/x
  3. Step 3: Cross multiply
    712,631.85x = 983,432.34 × 390,347.28
  4. Step 4: Simplify right side
    712,631.85x = 383,880,138,983.04
  5. Step 5: Solve for x
    x = 383,880,138,983.04/712,631.85
  6. Step 6: Final answer
    x = 538,679.46

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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.