Home / 739,402.18-1,020,378.08-399,870.43

Finding the Fourth Proportional to 739,402.18, 1,020,378.08 and 399,870.43

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Solution

The fourth proportional to 739,402.18, 1,020,378.08 and 399,870.43 is: 551,822.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,402.18 : 1,020,378.08 = 399,870.43 : x
  2. Step 2: Convert to fraction form
    739,402.18/1,020,378.08 = 399,870.43/x
  3. Step 3: Cross multiply
    739,402.18x = 1,020,378.08 × 399,870.43
  4. Step 4: Simplify right side
    739,402.18x = 408,019,021,612.17
  5. Step 5: Solve for x
    x = 408,019,021,612.17/739,402.18
  6. Step 6: Final answer
    x = 551,822.85

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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.