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Finding the Fourth Proportional to 661,978.98, 913,484.79 and 375,545.16

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Solution

The fourth proportional to 661,978.98, 913,484.79 and 375,545.16 is: 518,226.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,978.98 : 913,484.79 = 375,545.16 : x
  2. Step 2: Convert to fraction form
    661,978.98/913,484.79 = 375,545.16/x
  3. Step 3: Cross multiply
    661,978.98x = 913,484.79 × 375,545.16
  4. Step 4: Simplify right side
    661,978.98x = 343,054,791,618.12
  5. Step 5: Solve for x
    x = 343,054,791,618.12/661,978.98
  6. Step 6: Final answer
    x = 518,226.11

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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.