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Finding the Fourth Proportional to 630,908.79, 870,703.83 and 358,988.15

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Solution

The fourth proportional to 630,908.79, 870,703.83 and 358,988.15 is: 495,431.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,908.79 : 870,703.83 = 358,988.15 : x
  2. Step 2: Convert to fraction form
    630,908.79/870,703.83 = 358,988.15/x
  3. Step 3: Cross multiply
    630,908.79x = 870,703.83 × 358,988.15
  4. Step 4: Simplify right side
    630,908.79x = 312,572,352,776.10
  5. Step 5: Solve for x
    x = 312,572,352,776.10/630,908.79
  6. Step 6: Final answer
    x = 495,431.92

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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.