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Finding the Fourth Proportional to 717,853.77, 990,570.51 and 423,457.60

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Solution

The fourth proportional to 717,853.77, 990,570.51 and 423,457.60 is: 584,331.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,853.77 : 990,570.51 = 423,457.60 : x
  2. Step 2: Convert to fraction form
    717,853.77/990,570.51 = 423,457.60/x
  3. Step 3: Cross multiply
    717,853.77x = 990,570.51 × 423,457.60
  4. Step 4: Simplify right side
    717,853.77x = 419,464,610,795.38
  5. Step 5: Solve for x
    x = 419,464,610,795.38/717,853.77
  6. Step 6: Final answer
    x = 584,331.56

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Double scale
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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.