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Finding the Fourth Proportional to 708,297.32, 977,338.50 and 398,138.72

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Solution

The fourth proportional to 708,297.32, 977,338.50 and 398,138.72 is: 549,368.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,297.32 : 977,338.50 = 398,138.72 : x
  2. Step 2: Convert to fraction form
    708,297.32/977,338.50 = 398,138.72/x
  3. Step 3: Cross multiply
    708,297.32x = 977,338.50 × 398,138.72
  4. Step 4: Simplify right side
    708,297.32x = 389,116,299,396.72
  5. Step 5: Solve for x
    x = 389,116,299,396.72/708,297.32
  6. Step 6: Final answer
    x = 549,368.59

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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.