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Finding the Fourth Proportional to 921,346, 1,382,210.16 and 388,871.44

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Solution

The fourth proportional to 921,346, 1,382,210.16 and 388,871.44 is: 583,387.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,346 : 1,382,210.16 = 388,871.44 : x
  2. Step 2: Convert to fraction form
    921,346/1,382,210.16 = 388,871.44/x
  3. Step 3: Cross multiply
    921,346x = 1,382,210.16 × 388,871.44
  4. Step 4: Simplify right side
    921,346x = 537,502,055,301.83
  5. Step 5: Solve for x
    x = 537,502,055,301.83/921,346
  6. Step 6: Final answer
    x = 583,387.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.