Home / 712,542.90-983,272.36-390,190.80

Finding the Fourth Proportional to 712,542.90, 983,272.36 and 390,190.80

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Solution

The fourth proportional to 712,542.90, 983,272.36 and 390,190.80 is: 538,443.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,542.90 : 983,272.36 = 390,190.80 : x
  2. Step 2: Convert to fraction form
    712,542.90/983,272.36 = 390,190.80/x
  3. Step 3: Cross multiply
    712,542.90x = 983,272.36 × 390,190.80
  4. Step 4: Simplify right side
    712,542.90x = 383,663,828,766.29
  5. Step 5: Solve for x
    x = 383,663,828,766.29/712,542.90
  6. Step 6: Final answer
    x = 538,443.13

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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.