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Finding the Fourth Proportional to 630,642.96, 870,279.12 and 385,545.87

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Solution

The fourth proportional to 630,642.96, 870,279.12 and 385,545.87 is: 532,048.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,642.96 : 870,279.12 = 385,545.87 : x
  2. Step 2: Convert to fraction form
    630,642.96/870,279.12 = 385,545.87/x
  3. Step 3: Cross multiply
    630,642.96x = 870,279.12 × 385,545.87
  4. Step 4: Simplify right side
    630,642.96x = 335,532,520,463.23
  5. Step 5: Solve for x
    x = 335,532,520,463.23/630,642.96
  6. Step 6: Final answer
    x = 532,048.31

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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.