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Finding the Fourth Proportional to 630,829.09, 870,513.81 and 358,871.49

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Solution

The fourth proportional to 630,829.09, 870,513.81 and 358,871.49 is: 495,225.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,829.09 : 870,513.81 = 358,871.49 : x
  2. Step 2: Convert to fraction form
    630,829.09/870,513.81 = 358,871.49/x
  3. Step 3: Cross multiply
    630,829.09x = 870,513.81 × 358,871.49
  4. Step 4: Simplify right side
    630,829.09x = 312,402,588,060.28
  5. Step 5: Solve for x
    x = 312,402,588,060.28/630,829.09
  6. Step 6: Final answer
    x = 495,225.40

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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.