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Finding the Fourth Proportional to 710,070.56, 979,892.19 and 387,780.56

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Solution

The fourth proportional to 710,070.56, 979,892.19 and 387,780.56 is: 535,134.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,070.56 : 979,892.19 = 387,780.56 : x
  2. Step 2: Convert to fraction form
    710,070.56/979,892.19 = 387,780.56/x
  3. Step 3: Cross multiply
    710,070.56x = 979,892.19 × 387,780.56
  4. Step 4: Simplify right side
    710,070.56x = 379,983,137,278.37
  5. Step 5: Solve for x
    x = 379,983,137,278.37/710,070.56
  6. Step 6: Final answer
    x = 535,134.34

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1.5x scale

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.