Home / 712,623.79-983,421.26-390,339.28

Finding the Fourth Proportional to 712,623.79, 983,421.26 and 390,339.28

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Solution

The fourth proportional to 712,623.79, 983,421.26 and 390,339.28 is: 538,668.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,623.79 : 983,421.26 = 390,339.28 : x
  2. Step 2: Convert to fraction form
    712,623.79/983,421.26 = 390,339.28/x
  3. Step 3: Cross multiply
    712,623.79x = 983,421.26 × 390,339.28
  4. Step 4: Simplify right side
    712,623.79x = 383,867,946,565.09
  5. Step 5: Solve for x
    x = 383,867,946,565.09/712,623.79
  6. Step 6: Final answer
    x = 538,668.44

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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.