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Finding the Fourth Proportional to 388,649.48, 583,051.98 and 139,350.92

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Solution

The fourth proportional to 388,649.48, 583,051.98 and 139,350.92 is: 209,054.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,649.48 : 583,051.98 = 139,350.92 : x
  2. Step 2: Convert to fraction form
    388,649.48/583,051.98 = 139,350.92/x
  3. Step 3: Cross multiply
    388,649.48x = 583,051.98 × 139,350.92
  4. Step 4: Simplify right side
    388,649.48x = 81,248,829,820.82
  5. Step 5: Solve for x
    x = 81,248,829,820.82/388,649.48
  6. Step 6: Final answer
    x = 209,054.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.