Home / 712,623.20-983,419.80-390,353.36

Finding the Fourth Proportional to 712,623.20, 983,419.80 and 390,353.36

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Solution

The fourth proportional to 712,623.20, 983,419.80 and 390,353.36 is: 538,687.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,623.20 : 983,419.80 = 390,353.36 : x
  2. Step 2: Convert to fraction form
    712,623.20/983,419.80 = 390,353.36/x
  3. Step 3: Cross multiply
    712,623.20x = 983,419.80 × 390,353.36
  4. Step 4: Simplify right side
    712,623.20x = 383,881,223,220.53
  5. Step 5: Solve for x
    x = 383,881,223,220.53/712,623.20
  6. Step 6: Final answer
    x = 538,687.52

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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.