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Finding the Fourth Proportional to 716,859.54, 989,043.48 and 406,710.81

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Solution

The fourth proportional to 716,859.54, 989,043.48 and 406,710.81 is: 561,134.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,859.54 : 989,043.48 = 406,710.81 : x
  2. Step 2: Convert to fraction form
    716,859.54/989,043.48 = 406,710.81/x
  3. Step 3: Cross multiply
    716,859.54x = 989,043.48 × 406,710.81
  4. Step 4: Simplify right side
    716,859.54x = 402,254,674,876.02
  5. Step 5: Solve for x
    x = 402,254,674,876.02/716,859.54
  6. Step 6: Final answer
    x = 561,134.58

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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.