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Finding the Fourth Proportional to 708,384.07, 977,604.60 and 398,384.20

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Solution

The fourth proportional to 708,384.07, 977,604.60 and 398,384.20 is: 549,789.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,384.07 : 977,604.60 = 398,384.20 : x
  2. Step 2: Convert to fraction form
    708,384.07/977,604.60 = 398,384.20/x
  3. Step 3: Cross multiply
    708,384.07x = 977,604.60 × 398,384.20
  4. Step 4: Simplify right side
    708,384.07x = 389,462,226,487.32
  5. Step 5: Solve for x
    x = 389,462,226,487.32/708,384.07
  6. Step 6: Final answer
    x = 549,789.65

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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.