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Finding the Fourth Proportional to 557,358.61, 769,389.75 and 376,315.51

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Solution

The fourth proportional to 557,358.61, 769,389.75 and 376,315.51 is: 519,473.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,358.61 : 769,389.75 = 376,315.51 : x
  2. Step 2: Convert to fraction form
    557,358.61/769,389.75 = 376,315.51/x
  3. Step 3: Cross multiply
    557,358.61x = 769,389.75 × 376,315.51
  4. Step 4: Simplify right side
    557,358.61x = 289,533,290,431.50
  5. Step 5: Solve for x
    x = 289,533,290,431.50/557,358.61
  6. Step 6: Final answer
    x = 519,473.98

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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.