Home / 712,669.83-983,484.60-390,391.53

Finding the Fourth Proportional to 712,669.83, 983,484.60 and 390,391.53

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Solution

The fourth proportional to 712,669.83, 983,484.60 and 390,391.53 is: 538,740.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,669.83 : 983,484.60 = 390,391.53 : x
  2. Step 2: Convert to fraction form
    712,669.83/983,484.60 = 390,391.53/x
  3. Step 3: Cross multiply
    712,669.83x = 983,484.60 × 390,391.53
  4. Step 4: Simplify right side
    712,669.83x = 383,944,057,725.44
  5. Step 5: Solve for x
    x = 383,944,057,725.44/712,669.83
  6. Step 6: Final answer
    x = 538,740.44

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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.