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Finding the Fourth Proportional to 717,258.78, 989,741.86 and 407,062.59

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Solution

The fourth proportional to 717,258.78, 989,741.86 and 407,062.59 is: 561,703.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,258.78 : 989,741.86 = 407,062.59 : x
  2. Step 2: Convert to fraction form
    717,258.78/989,741.86 = 407,062.59/x
  3. Step 3: Cross multiply
    717,258.78x = 989,741.86 × 407,062.59
  4. Step 4: Simplify right side
    717,258.78x = 402,886,884,162.34
  5. Step 5: Solve for x
    x = 402,886,884,162.34/717,258.78
  6. Step 6: Final answer
    x = 561,703.66

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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.