Home / 712,621.20-983,417.04-390,351.36

Finding the Fourth Proportional to 712,621.20, 983,417.04 and 390,351.36

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Solution

The fourth proportional to 712,621.20, 983,417.04 and 390,351.36 is: 538,684.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,621.20 : 983,417.04 = 390,351.36 : x
  2. Step 2: Convert to fraction form
    712,621.20/983,417.04 = 390,351.36/x
  3. Step 3: Cross multiply
    712,621.20x = 983,417.04 × 390,351.36
  4. Step 4: Simplify right side
    712,621.20x = 383,878,179,011.17
  5. Step 5: Solve for x
    x = 383,878,179,011.17/712,621.20
  6. Step 6: Final answer
    x = 538,684.76

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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.