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Finding the Fourth Proportional to 760,838.88, 1,049,957 and 421,307.12

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Solution

The fourth proportional to 760,838.88, 1,049,957 and 421,307.12 is: 581,403.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    760,838.88 : 1,049,957 = 421,307.12 : x
  2. Step 2: Convert to fraction form
    760,838.88/1,049,957 = 421,307.12/x
  3. Step 3: Cross multiply
    760,838.88x = 1,049,957 × 421,307.12
  4. Step 4: Simplify right side
    760,838.88x = 442,354,359,793.84
  5. Step 5: Solve for x
    x = 442,354,359,793.84/760,838.88
  6. Step 6: Final answer
    x = 581,403.46

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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.