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Finding the Fourth Proportional to 630,607.28, 870,257.12 and 358,714.17

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Solution

The fourth proportional to 630,607.28, 870,257.12 and 358,714.17 is: 495,036.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,607.28 : 870,257.12 = 358,714.17 : x
  2. Step 2: Convert to fraction form
    630,607.28/870,257.12 = 358,714.17/x
  3. Step 3: Cross multiply
    630,607.28x = 870,257.12 × 358,714.17
  4. Step 4: Simplify right side
    630,607.28x = 312,173,558,693.82
  5. Step 5: Solve for x
    x = 312,173,558,693.82/630,607.28
  6. Step 6: Final answer
    x = 495,036.41

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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.