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Finding the Fourth Proportional to 545,681.61, 753,048.63 and 316,255.86

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Solution

The fourth proportional to 545,681.61, 753,048.63 and 316,255.86 is: 436,437.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,681.61 : 753,048.63 = 316,255.86 : x
  2. Step 2: Convert to fraction form
    545,681.61/753,048.63 = 316,255.86/x
  3. Step 3: Cross multiply
    545,681.61x = 753,048.63 × 316,255.86
  4. Step 4: Simplify right side
    545,681.61x = 238,156,042,102.47
  5. Step 5: Solve for x
    x = 238,156,042,102.47/545,681.61
  6. Step 6: Final answer
    x = 436,437.73

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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.