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Finding the Fourth Proportional to 670,478.72, 999,401.96 and 616,670.32

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Solution

The fourth proportional to 670,478.72, 999,401.96 and 616,670.32 is: 919,196.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,478.72 : 999,401.96 = 616,670.32 : x
  2. Step 2: Convert to fraction form
    670,478.72/999,401.96 = 616,670.32/x
  3. Step 3: Cross multiply
    670,478.72x = 999,401.96 × 616,670.32
  4. Step 4: Simplify right side
    670,478.72x = 616,301,526,481.83
  5. Step 5: Solve for x
    x = 616,301,526,481.83/670,478.72
  6. Step 6: Final answer
    x = 919,196.25

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.