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Finding the Fourth Proportional to 708,295.32, 977,335.74 and 398,136.72

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Solution

The fourth proportional to 708,295.32, 977,335.74 and 398,136.72 is: 549,365.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,295.32 : 977,335.74 = 398,136.72 : x
  2. Step 2: Convert to fraction form
    708,295.32/977,335.74 = 398,136.72/x
  3. Step 3: Cross multiply
    708,295.32x = 977,335.74 × 398,136.72
  4. Step 4: Simplify right side
    708,295.32x = 389,113,245,862.37
  5. Step 5: Solve for x
    x = 389,113,245,862.37/708,295.32
  6. Step 6: Final answer
    x = 549,365.83

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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.