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Finding the Fourth Proportional to 708,138.71, 977,231.55 and 385,848.89

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Solution

The fourth proportional to 708,138.71, 977,231.55 and 385,848.89 is: 532,471.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,138.71 : 977,231.55 = 385,848.89 : x
  2. Step 2: Convert to fraction form
    708,138.71/977,231.55 = 385,848.89/x
  3. Step 3: Cross multiply
    708,138.71x = 977,231.55 × 385,848.89
  4. Step 4: Simplify right side
    708,138.71x = 377,063,708,840.48
  5. Step 5: Solve for x
    x = 377,063,708,840.48/708,138.71
  6. Step 6: Final answer
    x = 532,471.54

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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.