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Finding the Fourth Proportional to 722,776.65, 997,430.80 and 400,507.62

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Solution

The fourth proportional to 722,776.65, 997,430.80 and 400,507.62 is: 552,699.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,776.65 : 997,430.80 = 400,507.62 : x
  2. Step 2: Convert to fraction form
    722,776.65/997,430.80 = 400,507.62/x
  3. Step 3: Cross multiply
    722,776.65x = 997,430.80 × 400,507.62
  4. Step 4: Simplify right side
    722,776.65x = 399,478,635,822.70
  5. Step 5: Solve for x
    x = 399,478,635,822.70/722,776.65
  6. Step 6: Final answer
    x = 552,699.97

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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.