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Finding the Fourth Proportional to 708,495.39, 977,674.79 and 398,444.33

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Solution

The fourth proportional to 708,495.39, 977,674.79 and 398,444.33 is: 549,825.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,495.39 : 977,674.79 = 398,444.33 : x
  2. Step 2: Convert to fraction form
    708,495.39/977,674.79 = 398,444.33/x
  3. Step 3: Cross multiply
    708,495.39x = 977,674.79 × 398,444.33
  4. Step 4: Simplify right side
    708,495.39x = 389,548,980,099.74
  5. Step 5: Solve for x
    x = 389,548,980,099.74/708,495.39
  6. Step 6: Final answer
    x = 549,825.71

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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.