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Finding the Fourth Proportional to 877,387, 1,210,795.68 and 474,979

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Solution

The fourth proportional to 877,387, 1,210,795.68 and 474,979 is: 655,471.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,387 : 1,210,795.68 = 474,979 : x
  2. Step 2: Convert to fraction form
    877,387/1,210,795.68 = 474,979/x
  3. Step 3: Cross multiply
    877,387x = 1,210,795.68 × 474,979
  4. Step 4: Simplify right side
    877,387x = 575,102,521,290.72
  5. Step 5: Solve for x
    x = 575,102,521,290.72/877,387
  6. Step 6: Final answer
    x = 655,471.90

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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.