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Finding the Fourth Proportional to 630,735.36, 870,428.16 and 358,794.24

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Solution

The fourth proportional to 630,735.36, 870,428.16 and 358,794.24 is: 495,143.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,735.36 : 870,428.16 = 358,794.24 : x
  2. Step 2: Convert to fraction form
    630,735.36/870,428.16 = 358,794.24/x
  3. Step 3: Cross multiply
    630,735.36x = 870,428.16 × 358,794.24
  4. Step 4: Simplify right side
    630,735.36x = 312,304,610,141.80
  5. Step 5: Solve for x
    x = 312,304,610,141.80/630,735.36
  6. Step 6: Final answer
    x = 495,143.65

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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.