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Finding the Fourth Proportional to 1,386,739.84, 1,913,664.23 and 774,897.66

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Solution

The fourth proportional to 1,386,739.84, 1,913,664.23 and 774,897.66 is: 1,069,338.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386,739.84 : 1,913,664.23 = 774,897.66 : x
  2. Step 2: Convert to fraction form
    1,386,739.84/1,913,664.23 = 774,897.66/x
  3. Step 3: Cross multiply
    1,386,739.84x = 1,913,664.23 × 774,897.66
  4. Step 4: Simplify right side
    1,386,739.84x = 1,482,893,924,284.38
  5. Step 5: Solve for x
    x = 1,482,893,924,284.38/1,386,739.84
  6. Step 6: Final answer
    x = 1,069,338.23

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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.