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Finding the Fourth Proportional to 630,543.98, 870,169.86 and 358,650.98

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Solution

The fourth proportional to 630,543.98, 870,169.86 and 358,650.98 is: 494,949.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,543.98 : 870,169.86 = 358,650.98 : x
  2. Step 2: Convert to fraction form
    630,543.98/870,169.86 = 358,650.98/x
  3. Step 3: Cross multiply
    630,543.98x = 870,169.86 × 358,650.98
  4. Step 4: Simplify right side
    630,543.98x = 312,087,273,055.46
  5. Step 5: Solve for x
    x = 312,087,273,055.46/630,543.98
  6. Step 6: Final answer
    x = 494,949.25

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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.