Home / 712,624.04-983,421.60-390,339.53

Finding the Fourth Proportional to 712,624.04, 983,421.60 and 390,339.53

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Solution

The fourth proportional to 712,624.04, 983,421.60 and 390,339.53 is: 538,668.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,624.04 : 983,421.60 = 390,339.53 : x
  2. Step 2: Convert to fraction form
    712,624.04/983,421.60 = 390,339.53/x
  3. Step 3: Cross multiply
    712,624.04x = 983,421.60 × 390,339.53
  4. Step 4: Simplify right side
    712,624.04x = 383,868,325,135.85
  5. Step 5: Solve for x
    x = 383,868,325,135.85/712,624.04
  6. Step 6: Final answer
    x = 538,668.78

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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.