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Finding the Fourth Proportional to 387,630, 581,444.98 and 121,411.34

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Solution

The fourth proportional to 387,630, 581,444.98 and 121,411.34 is: 182,117.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,630 : 581,444.98 = 121,411.34 : x
  2. Step 2: Convert to fraction form
    387,630/581,444.98 = 121,411.34/x
  3. Step 3: Cross multiply
    387,630x = 581,444.98 × 121,411.34
  4. Step 4: Simplify right side
    387,630x = 70,594,014,158.07
  5. Step 5: Solve for x
    x = 70,594,014,158.07/387,630
  6. Step 6: Final answer
    x = 182,117.00

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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.