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Finding the Fourth Proportional to 1,007,503, 1,390,363.86 and 554,803.72

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Solution

The fourth proportional to 1,007,503, 1,390,363.86 and 554,803.72 is: 765,634.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,007,503 : 1,390,363.86 = 554,803.72 : x
  2. Step 2: Convert to fraction form
    1,007,503/1,390,363.86 = 554,803.72/x
  3. Step 3: Cross multiply
    1,007,503x = 1,390,363.86 × 554,803.72
  4. Step 4: Simplify right side
    1,007,503x = 771,379,041,681.56
  5. Step 5: Solve for x
    x = 771,379,041,681.56/1,007,503
  6. Step 6: Final answer
    x = 765,634.49

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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.