Home / 728,913.32-1,005,902.02-406,615.40

Finding the Fourth Proportional to 728,913.32, 1,005,902.02 and 406,615.40

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Solution

The fourth proportional to 728,913.32, 1,005,902.02 and 406,615.40 is: 561,130.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,913.32 : 1,005,902.02 = 406,615.40 : x
  2. Step 2: Convert to fraction form
    728,913.32/1,005,902.02 = 406,615.40/x
  3. Step 3: Cross multiply
    728,913.32x = 1,005,902.02 × 406,615.40
  4. Step 4: Simplify right side
    728,913.32x = 409,015,252,223.11
  5. Step 5: Solve for x
    x = 409,015,252,223.11/728,913.32
  6. Step 6: Final answer
    x = 561,130.17

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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.