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Finding the Fourth Proportional to 578,018.80, 869,101.80 and 486,780.40

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Solution

The fourth proportional to 578,018.80, 869,101.80 and 486,780.40 is: 731,916.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,018.80 : 869,101.80 = 486,780.40 : x
  2. Step 2: Convert to fraction form
    578,018.80/869,101.80 = 486,780.40/x
  3. Step 3: Cross multiply
    578,018.80x = 869,101.80 × 486,780.40
  4. Step 4: Simplify right side
    578,018.80x = 423,061,721,844.72
  5. Step 5: Solve for x
    x = 423,061,721,844.72/578,018.80
  6. Step 6: Final answer
    x = 731,916.89

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1.5x scale

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.