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Finding the Fourth Proportional to 543,210.78, 749,723.65 and 313,726.82

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Solution

The fourth proportional to 543,210.78, 749,723.65 and 313,726.82 is: 432,996.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,210.78 : 749,723.65 = 313,726.82 : x
  2. Step 2: Convert to fraction form
    543,210.78/749,723.65 = 313,726.82/x
  3. Step 3: Cross multiply
    543,210.78x = 749,723.65 × 313,726.82
  4. Step 4: Simplify right side
    543,210.78x = 235,208,417,683.29
  5. Step 5: Solve for x
    x = 235,208,417,683.29/543,210.78
  6. Step 6: Final answer
    x = 432,996.59

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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.