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Finding the Fourth Proportional to 716,840.64, 988,192.80 and 501,310.08

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Solution

The fourth proportional to 716,840.64, 988,192.80 and 501,310.08 is: 691,075.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,840.64 : 988,192.80 = 501,310.08 : x
  2. Step 2: Convert to fraction form
    716,840.64/988,192.80 = 501,310.08/x
  3. Step 3: Cross multiply
    716,840.64x = 988,192.80 × 501,310.08
  4. Step 4: Simplify right side
    716,840.64x = 495,391,011,623.42
  5. Step 5: Solve for x
    x = 495,391,011,623.42/716,840.64
  6. Step 6: Final answer
    x = 691,075.51

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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.