Home / 712,730.88-983,565.72-390,440.52

Finding the Fourth Proportional to 712,730.88, 983,565.72 and 390,440.52

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Solution

The fourth proportional to 712,730.88, 983,565.72 and 390,440.52 is: 538,806.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,730.88 : 983,565.72 = 390,440.52 : x
  2. Step 2: Convert to fraction form
    712,730.88/983,565.72 = 390,440.52/x
  3. Step 3: Cross multiply
    712,730.88x = 983,565.72 × 390,440.52
  4. Step 4: Simplify right side
    712,730.88x = 384,023,911,170.97
  5. Step 5: Solve for x
    x = 384,023,911,170.97/712,730.88
  6. Step 6: Final answer
    x = 538,806.33

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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.