Home / 712,417.73-983,106.94-390,122.28

Finding the Fourth Proportional to 712,417.73, 983,106.94 and 390,122.28

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Solution

The fourth proportional to 712,417.73, 983,106.94 and 390,122.28 is: 538,352.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,417.73 : 983,106.94 = 390,122.28 : x
  2. Step 2: Convert to fraction form
    712,417.73/983,106.94 = 390,122.28/x
  3. Step 3: Cross multiply
    712,417.73x = 983,106.94 × 390,122.28
  4. Step 4: Simplify right side
    712,417.73x = 383,531,916,001.09
  5. Step 5: Solve for x
    x = 383,531,916,001.09/712,417.73
  6. Step 6: Final answer
    x = 538,352.57

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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.