Home / 712,602.20-983,390.82-390,332.36

Finding the Fourth Proportional to 712,602.20, 983,390.82 and 390,332.36

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Solution

The fourth proportional to 712,602.20, 983,390.82 and 390,332.36 is: 538,658.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,602.20 : 983,390.82 = 390,332.36 : x
  2. Step 2: Convert to fraction form
    712,602.20/983,390.82 = 390,332.36/x
  3. Step 3: Cross multiply
    712,602.20x = 983,390.82 × 390,332.36
  4. Step 4: Simplify right side
    712,602.20x = 383,849,259,572.94
  5. Step 5: Solve for x
    x = 383,849,259,572.94/712,602.20
  6. Step 6: Final answer
    x = 538,658.54

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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.