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Finding the Fourth Proportional to 709,461, 979,047.90 and 387,176.52

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Solution

The fourth proportional to 709,461, 979,047.90 and 387,176.52 is: 534,299.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,461 : 979,047.90 = 387,176.52 : x
  2. Step 2: Convert to fraction form
    709,461/979,047.90 = 387,176.52/x
  3. Step 3: Cross multiply
    709,461x = 979,047.90 × 387,176.52
  4. Step 4: Simplify right side
    709,461x = 379,064,358,835.31
  5. Step 5: Solve for x
    x = 379,064,358,835.31/709,461
  6. Step 6: Final answer
    x = 534,299.08

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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.