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Finding the Fourth Proportional to 630,883.72, 870,542.94 and 358,986.16

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Solution

The fourth proportional to 630,883.72, 870,542.94 and 358,986.16 is: 495,357.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,883.72 : 870,542.94 = 358,986.16 : x
  2. Step 2: Convert to fraction form
    630,883.72/870,542.94 = 358,986.16/x
  3. Step 3: Cross multiply
    630,883.72x = 870,542.94 × 358,986.16
  4. Step 4: Simplify right side
    630,883.72x = 312,512,867,145.71
  5. Step 5: Solve for x
    x = 312,512,867,145.71/630,883.72
  6. Step 6: Final answer
    x = 495,357.32

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1.5x scale

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.