Home / 708,217,453.38-977,295,845.60-390,681,372.06

Finding the Fourth Proportional to 708,217,453.38, 977,295,845.60 and 390,681,372.06

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Solution

The fourth proportional to 708,217,453.38, 977,295,845.60 and 390,681,372.06 is: 539,115,888.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,217,453.38 : 977,295,845.60 = 390,681,372.06 : x
  2. Step 2: Convert to fraction form
    708,217,453.38/977,295,845.60 = 390,681,372.06/x
  3. Step 3: Cross multiply
    708,217,453.38x = 977,295,845.60 × 390,681,372.06
  4. Step 4: Simplify right side
    708,217,453.38x = 381,811,281,867,545,920
  5. Step 5: Solve for x
    x = 381,811,281,867,545,920/708,217,453.38
  6. Step 6: Final answer
    x = 539,115,888.84

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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.