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Finding the Fourth Proportional to 630,690, 870,370.56 and 344,228.40

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Solution

The fourth proportional to 630,690, 870,370.56 and 344,228.40 is: 475,045.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,690 : 870,370.56 = 344,228.40 : x
  2. Step 2: Convert to fraction form
    630,690/870,370.56 = 344,228.40/x
  3. Step 3: Cross multiply
    630,690x = 870,370.56 × 344,228.40
  4. Step 4: Simplify right side
    630,690x = 299,606,265,275.90
  5. Step 5: Solve for x
    x = 299,606,265,275.90/630,690
  6. Step 6: Final answer
    x = 475,045.21

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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.