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Finding the Fourth Proportional to 708,117.54, 977,189.84 and 385,830.30

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Solution

The fourth proportional to 708,117.54, 977,189.84 and 385,830.30 is: 532,439.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,117.54 : 977,189.84 = 385,830.30 : x
  2. Step 2: Convert to fraction form
    708,117.54/977,189.84 = 385,830.30/x
  3. Step 3: Cross multiply
    708,117.54x = 977,189.84 × 385,830.30
  4. Step 4: Simplify right side
    708,117.54x = 377,029,449,124.15
  5. Step 5: Solve for x
    x = 377,029,449,124.15/708,117.54
  6. Step 6: Final answer
    x = 532,439.08

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Double scale
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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.