Home / 712,618.94-983,428.29-390,329.06

Finding the Fourth Proportional to 712,618.94, 983,428.29 and 390,329.06

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Solution

The fourth proportional to 712,618.94, 983,428.29 and 390,329.06 is: 538,661.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,618.94 : 983,428.29 = 390,329.06 : x
  2. Step 2: Convert to fraction form
    712,618.94/983,428.29 = 390,329.06/x
  3. Step 3: Cross multiply
    712,618.94x = 983,428.29 × 390,329.06
  4. Step 4: Simplify right side
    712,618.94x = 383,860,640,013.11
  5. Step 5: Solve for x
    x = 383,860,640,013.11/712,618.94
  6. Step 6: Final answer
    x = 538,661.85

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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.