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Finding the Fourth Proportional to 630,914.81, 870,712.11 and 358,994.16

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Solution

The fourth proportional to 630,914.81, 870,712.11 and 358,994.16 is: 495,440.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,914.81 : 870,712.11 = 358,994.16 : x
  2. Step 2: Convert to fraction form
    630,914.81/870,712.11 = 358,994.16/x
  3. Step 3: Cross multiply
    630,914.81x = 870,712.11 × 358,994.16
  4. Step 4: Simplify right side
    630,914.81x = 312,580,562,531.28
  5. Step 5: Solve for x
    x = 312,580,562,531.28/630,914.81
  6. Step 6: Final answer
    x = 495,440.21

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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.