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Finding the Fourth Proportional to 739,437, 1,020,423.72 and 399,905.25

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Solution

The fourth proportional to 739,437, 1,020,423.72 and 399,905.25 is: 551,869.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,437 : 1,020,423.72 = 399,905.25 : x
  2. Step 2: Convert to fraction form
    739,437/1,020,423.72 = 399,905.25/x
  3. Step 3: Cross multiply
    739,437x = 1,020,423.72 × 399,905.25
  4. Step 4: Simplify right side
    739,437x = 408,072,802,852.53
  5. Step 5: Solve for x
    x = 408,072,802,852.53/739,437
  6. Step 6: Final answer
    x = 551,869.60

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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.